JP6007545B2 - Inspection target and inspection system - Google Patents

Description

  The present invention relates to a test target for examining the visual function of a subject.

  There is a stereo test as a technique for measuring the stereoscopic function of a subject, for example, an inspection method as described in Patent Document 1.

JP-A-6-240551

  The stereoscopic function relates to a plurality of elements, and is related to, for example, a refractive state such as hyperopia, myopia, and astigmatism, and an eye position such as strabismus. In the conventional visual function inspection, hyperopia, myopia, astigmatism, strabismus, stereoscopic vision, and the like are inspected, and the stereoscopic function combining these plural elements cannot be inspected.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an inspection target capable of inspecting a visual function including a plurality of elements, particularly a visual function including a stereoscopic function. .

  The present invention has been made to achieve the above object, for example, an inspection target to be examined including a visual acuity value, which includes a target unit having a plurality of targets and a shielding unit. Each of the visual targets has a right-eye image that is an image provided to the subject's right eye and a left-eye image that is provided to the subject's left eye, and the right-eye image and the left-eye image are The same target image is arranged in the horizontal direction, and the target image has a characteristic portion having a size corresponding to the visual angle of the subject at a visual distance from the subject, and the target unit has the Each target has a different horizontal distance between the right-eye image and the left-eye image, and the shielding unit shields the right-eye image of each target from the left eye, and the left-eye image The right eye is shielded.

  In addition, for example, each of the visual targets included in the visual target unit is different in size of the visual target image.

  Further, for example, each of the targets included in the target unit is different in the direction of the feature unit of each target.

  According to the technology of the present invention, it is possible to examine visual functions including a plurality of elements, particularly visual functions including visual acuity values and stereoscopic functions.

It is a figure explaining the example at the time of carrying out the stereoscopic vision of the test | inspection target of this embodiment. In the same embodiment, it is a figure for demonstrating the example of each binocular parallax image of a visual target. In the same embodiment, it is an example of the relationship between the viewing angle of the annular opening of each target, and the amount of protrusion and the amount of retraction. In the same embodiment, it is a figure explaining the test | inspection example in the case of providing each of the image for right eyes and the image for left eyes of each optotype with a sheet-like or plate-shaped medium. In the same embodiment, it is a figure which shows the structural example of a medium. In the same embodiment, it is a figure for demonstrating the structural condition of a medium. In the same embodiment, it is a figure which shows the structural example of a medium. In the same embodiment, it is a figure explaining the example of a test | inspection in the case of providing each of the image for right eyes and the image for left eyes of each optotype by a left-right image separation system. It is a figure which shows the structural example of an inspection apparatus in the embodiment. In the embodiment, it is a figure which shows the example of a structure of a system. In the embodiment, it is a figure which shows an example of optotype information. FIG. 6 is a diagram for explaining an operation example in the embodiment. In the same embodiment, it is an example of an output image.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  The present embodiment provides an inspection target that can be inspected including not only a stereoscopic function but also a visual acuity value. In the following, first, the inspection target of the present embodiment will be described, and then a technique for providing the inspection target will be described in detail.

  First, an inspection target that can be inspected including not only a stereoscopic function but also a visual acuity value will be described. Therefore, it is assumed that the inspection target of the present embodiment is stereoscopically viewable as described below.

  FIG. 1 is a diagram illustrating an example of a stereoscopic view of an inspection target according to the present embodiment. In the present embodiment, the target set 1 shown as an example in FIG. 1 can be provided. The target set 1 includes a target 101 having the same size and a plurality of targets 101 having different sizes but the same dimensional ratio. The shape of the target 101 is not particularly limited, but here is a Landolt ring in which the dimensional ratio of the diameter of the entire ring: the width of the arc: the opening width of the opening of the ring is 5: 1: 1. The Landolt ring is projected and / or retracted to enable stereoscopic viewing. The amount of protrusion and the amount of retraction are arbitrary, but, for example, at a viewing distance that is the distance from the subject's eye to the target set 1, a degree of stereoscopic parallax of 40 seconds to 800 seconds can be considered. The target set 1 shown in FIG. 1 has the same Landolt ring size, in other words, the viewing angle of the annular opening is the same, but the direction of the annular opening and the amount of protrusion and / or retraction. Are shown in the same column.

  In addition, although the example of FIG. 1 has shown the case where one target set 1 has the 4x3 target 101, the number, arrangement | positioning, etc. of the target 101 are arbitrary and it does not necessarily restrict to this. Absent. In addition, the number and the size of the target 101 of the same size are different, but the number ratio of the target 101 is the same, the direction of the annular opening of the target 101, the protruding amount and / or the retracting amount of the target 101 are arbitrary. However, it is not limited to this. Of the size, the direction of the annular opening, the pop-out amount, and / or the retraction amount, it is sufficient that there are a plurality of targets 101 having different pop-out amounts and / or retraction amounts. In addition, the shape of the target 101 is a Landolt ring, but the shape is not limited to this, and may be any shape such as hiragana, katakana, numerals, alphabets, and pictures. However, the visual angle of the subject, that is, the visual acuity, can be inspected when having a characteristic shape having a size corresponding to a predetermined viewing angle at a predetermined viewing distance, such as the ring opening of the Landolt ring. Further, when the shape of the target 101 is the same for the target 101 having different sizes, there is an advantage that a hint for determining the size based on the shape is not given to the subject.

  Here, the stereoscopic view will be briefly described. Elements that visually perceive a three-dimensional object include the size of the object, the relationship with other objects, the color, and the parallax (binocular parallax) between the right eye and the left eye when viewed with both eyes. In the target set 1 of the present embodiment, the stereoscopic function of a stationary object by binocular parallax is inspected, and for that purpose, each of the right eye image and the left eye image is provided to each of the right eye and the left eye. Composed.

  FIG. 2A is a diagram for explaining an example of binocular parallax images of each of the visual targets 101 of the visual target set 1 shown in FIG. 1 as an example. Moreover, the image 211 and the image 212 of FIG.2 (b) are the examples which showed the image for right eyes and the image for left eyes of the image 201 separately in Fig.2 (a). In this embodiment, as shown in FIG. 2A and FIG. 2B, as a stereoscopic image of each target 101, a Landolt ring of the same image, that is, a Landolt ring having the same size, color, and the like is used. The images shifted to the left and right (horizontal direction) are the right-eye image and the left-eye image. When the left and right images are binocularly fused, the amount of protrusion and the amount of retraction can be perceived in the fused image as the left and right shift amount of the Landolt ring of the right eye image and the left eye image increases. Here, the stereoscopic vision by binocular parallax may be based on the parallel method or the intersection method. Here, the Landolt ring is painted with a single color and does not express a three-dimensional effect due to a shadow or the like, but is not limited thereto. The color, texture, etc. of the Landolt ring are arbitrary, but the color, texture, etc. are not confused with the background.

  As described above, the target set 1 of the present embodiment has a plurality of targets 101 having different sizes. The right and left shift amounts of the Landolt ring of the right-eye image and the left-eye image are not particularly limited, but here, the smaller the size of the target 101, that is, the smaller the viewing angle of the annular opening, It is assumed that the amount of deviation is reduced. This is because the convergence angle tends to be smaller when the same object is far away than when it is close.

  Here, the relationship between the viewing angle of the annular opening of each target 101 of the target set 1 and the right and left shift amounts of the Landolt ring of the right-eye image and the left-eye image, that is, the pop-out amount and the retraction amount will be described. . FIG. 3 is an example of the relationship between the viewing angle of the annular opening of each target 101 and the amount of protrusion and retraction. In the table 301 of FIG. 3, the vertical axis 311 indicates the viewing angle of the annular opening of the target 101 at the viewing distance. Also, the horizontal axis 321 indicates the division of the projection amount and the retraction amount of the target 101 at each of the viewing angles of the annular opening of the target 101. FIG. 3 shows an example in which the projecting amount and the retracting amount of the target 101 are divided into three stages. Here, the projecting amount and the retracting amount increase in the order of the sections A, B, and C. A matrix portion 331 where the vertical axis 311 and the horizontal axis 321 intersect indicates a stereoscopic parallax angle at the viewing distance. Specifically, for example, in the table 301 of FIG. 3, when the viewing angle of the vertical axis 311 is “5”, the stereoscopic parallax angle in the section “A” of the horizontal axis 321 is “0”, and the section “B”. The stereoscopic parallax angle at is “400”, and the stereoscopic parallax angle at the section “C” is “800”. Here, the unit of the viewing angle on the vertical axis 311 is minutes, and the unit of the stereoscopic parallax angle of the matrix unit 331 is seconds.

  More specifically, for example, in the target set 1 in FIG. 1, the viewing angle of each annular opening of the three targets 101 in the broken line portion 111 is the viewing angle “on the vertical axis 311 in the table 301 in FIG. 5 ”, the left target 101 is set to the stereoscopic parallax angle“ 800 ”of the category“ C ”, the central target 101 is set to the stereoscopic parallax angle“ 0 ”of the category“ A ”, and the right target The visual target 101 corresponds to the stereoscopic parallax angle “400” of the category “B”. As described above, since the number of the vertical axis 311 is the visual angle of the annular opening of the target 101, for example, the visual angle “5” of the vertical axis 311 is “visual acuity = 1 / visual angle (min)”. Thus, it can be said that the visual acuity is “0.2”.

  Here, the unit of the viewing angle of the vertical axis 311 is minutes, and the unit of the stereoscopic parallax angle of the matrix unit 331 is seconds, but the present invention is not limited to this. Further, in the horizontal axis 321 of the above table 301, the division of the projection amount and the retraction amount of the target 101 is three stages, but the number of divisions is not limited to this and may be arbitrary. Further, in Table 301, the three-dimensional parallax angle of the segment of the horizontal axis 321 having the smallest pop-out amount and retracted amount is set to “0”, that is, there is no pop-out and retracted portion. Instead, there may be protrusions and withdrawals. In addition, the numerical values and divisions of the vertical axis 311, the horizontal axis 321, the matrix portion 331, etc. in the above table 301 are arbitrary, and are not limited to those shown in the figure. The optimization may be performed according to the technology for providing the inspection set 1, the purpose for providing the inspection set 1, and the like.

  Next, the inspection using the target set 1 will be described. As the inspection using the optotype set 1, for example, the following three are conceivable.

  In the first examination, whether or not the subject can recognize the direction of the annular opening of one target 101 indicated by the examiner and the direction of the opening indicated by the subject is the actual target. This is based on whether or not it coincides with the direction of the 101 annular opening.

  In the second examination, for example, as indicated by broken lines 111 and 112 in FIG. 1, the examiner or the like shows a plurality of targets 101, and the subject is one of the plurality of targets 101 indicated by the examiner or the like. An inspection based on whether or not the visual target 101 appears to be projected or retracted most, and whether or not the visual target 101 that the subject has most projected or retracted coincides with the actual projecting or retracting of the visual target 101 is there. The plurality of targets 101 shown in the second examination are not particularly limited, but as shown in the broken lines 111 and 112 in FIG. 1, the Landolt ring has the same size, that is, the viewing angle of the annular opening. Are the same target 101. Moreover, the number of the target 101 to be shown should just be two or more, and is not specifically limited.

  The third inspection is based on whether or not there is an object in which the direction of the annular opening is easily recognized or difficult to recognize among the plurality of targets 101 indicated by the examiner or the like. The plurality of targets 101 shown in the third examination are not particularly limited, but the size of the target 101 is the same, but the direction of the annular opening is preferably different.

  The visual function of the subject obtained by the above examination is indicated by an arbitrary number or the like.

  In the first inspection, for example, the first number, the second number, the third number, and the like can be considered. For example, as the first number, when the direction of the annular opening indicated by the subject coincides with the actual annular opening of the target 101, the degree of stereoscopic parallax according to the pop-out amount and the retraction amount of the target 101 Thus, it can be considered that the visual function of the subject is shown.

  Further, for example, as the second number, when the direction of the opening indicated by the subject coincides with the opening of the actual target 101, the target 101 having the smallest size is selected as the circle of the target 101. It is conceivable that the visual function of the subject is indicated by the visual angle obtained by the visual angle of the ring opening or the power determined according to the visual angle, that is, “1 / visual angle (min)”.

  In addition, for example, as the third number, the above-described combination, that is, the degree of stereoscopic parallax according to the amount of protrusion and retraction of the Landolt ring of the target 101 having the smallest size, and the viewing angle or visual acuity of the annular opening are obtained. It can be considered that the visual function of the subject is shown by the new number combined.

  The first number, the second number, and the third number will be described more specifically with an example. For example, as described above, in the target set 1 of FIG. 1, the viewing angle of the annular opening of the three targets 101 in the broken line portion 111 corresponds to the vertical axis 311 “5” in the table 301 of FIG. 3. The left optotype 101 is in the section “C” of the stereo parallax angle “800”, the central optotype 101 is in the section “A” of the stereo parallax angle “0”, and the right optotype 101 is in the section “B”. In the case where the stereoscopic parallax angle is “400”, an example in which the annular opening of the right target 101 among the three targets 101 in the broken line portion 111 matches will be described.

  In this case, as the first number, for example, the visual function of the subject can be indicated by a stereoscopic parallax angle “400”. In addition, as the second number, for example, the visual function of the subject can be indicated by a viewing angle “5” or a visual acuity “0.2”. Further, as the third number, for example, the visual function of the subject can be indicated by a rank “B” at a viewing angle “5” or a visual acuity “0.2”, or a new number obtained by combining these.

  The second inspection will be described. In the second inspection, for example, the fourth number, the fifth number, the sixth number, the seventh number, and the like can be considered. For example, as the fourth number, when the target 101 that the subject has most projected or retracted coincides with the actual projecting or retracting of the target 101, among the plurality of targets 101 that the examiner or the like has indicated The visual function of the subject may be indicated by the degree of stereoscopic parallax according to the maximum and / or minimum pop-up amount and / or retract amount of the Landolt ring.

  Further, for example, as the fifth number, when the target 101 that is most projected or retracted shown by the subject coincides with the actual projection or withdrawal of the target 101, the target 101 having the smallest size is selected. The visual function of the subject may be indicated by the visual angle of the annular opening of the visual target 101, or the power determined in accordance with the visual angle, that is, the visual acuity obtained by “1 / visual angle (min)”.

  In addition, for example, as the sixth number, the above-mentioned combination, that is, the degree of stereoscopic parallax corresponding to the largest and / or smallest amount of Landolt's pop-out amount and retraction amount of the target 101 having the smallest size, and its ring The visual function of the subject may be indicated by a new number that combines the viewing angle or visual acuity of the opening.

  In addition, for example, as the seventh number, the target 101 is simply shown as the Landolt ring size, that is, the target 101 having the same viewing angle of the annular opening, and the target 101 appears to protrude or retract most. Among the combinations in which the actual target 101 protrudes or retracts, the target 101 having the smallest size is determined by a new frequency determined according to the visual angle of the diameter of the entire ring of the target 101, etc. The visual function of the subject may be indicated. Specifically, for example, the broken line part 111 and the broken line part 112 are shown to the subject, and the visual target 101 that appears most popping out or retracted among the visual targets 101 in the broken line part 112 is projected from the actual visual target 101 or In the case of coincidence with the retraction, the visual function of the subject may be indicated by the power determined according to the visual angle of the diameter of the entire ring of the target 101 in the broken line portion 112.

  The fourth number, the fifth number, the sixth number, and the seventh number will be described more specifically with an example. For example, as described above, in the target set 1 of FIG. 1, the viewing angle of the annular opening of the three targets 101 in the broken line portion 111 corresponds to the vertical axis 311 “5” in the table 301 of FIG. 3. The left optotype 101 is in the section “C” of the stereo parallax angle “800”, the central optotype 101 is in the section “A” of the stereo parallax angle “0”, and the right optotype 101 is in the section “B”. In the case where the stereoscopic parallax angle is “400”, an example in which the three target 101 in the broken line portion 111 are projected or retracted will be described.

  In this case, as the fourth number, for example, the visual function of the subject can be indicated by a stereoscopic parallax angle “0” and / or “800”. Further, as the fifth number, for example, the visual function of the subject can be indicated by a viewing angle “5” or a visual acuity “0.2”. Further, as the sixth number, for example, the visual function of the subject is a stereoscopic parallax angle “0” and / or “800” at a viewing angle “5” or a visual acuity “0.2”, or a new combination thereof. It can be shown in a number. Further, as the seventh number, for example, as described above, in the present embodiment, since the diameter of the entire ring: the opening width of the ring opening is 5: 1, the viewing angle of the ring opening is “5”. ”, The viewing angle of the entire ring is“ 25 ”, and the visual function of the subject is a new frequency determined according to the viewing angle“ 25 ”of the entire ring or the viewing angle“ 25 ”of the entire ring. Etc.

  The third inspection will be described. In the third inspection, for example, the eighth number, the ninth number, the tenth number, and the like can be considered. For example, as the eighth number, it is conceivable that the visual function of the subject is indicated by the astigmatic axis determined by the direction of the easily recognized circular opening indicated by the subject.

  In addition, for example, as the ninth number, the subject's visual angle of the easy-to-recognize annulus opening or a power determined according to the visual angle, that is, the visual acuity obtained by “1 / viewing angle (min)”, It is possible to show the visual function.

  Further, for example, as the tenth number, the visual field of the subject is determined by the above combination, that is, a new number that combines the astigmatic axis determined by the direction of the annular opening and the viewing angle or visual acuity of the annular opening. It is possible to show the function.

  The eighth number, the ninth number, and the tenth number will be described more specifically with an example. For example, as described above, in the target set 1 of FIG. 1, the viewing angle of the annular opening of the three targets 101 in the broken line portion 111 corresponds to the vertical axis 311 “5” in the table 301 of FIG. 3. The left optotype 101 is in the section “C” of the stereo parallax angle “800”, the central optotype 101 is in the section “A” of the stereo parallax angle “0”, and the right optotype 101 is in the section “B”. In the case where the stereoscopic parallax angle is “400”, an example will be described in which the direction of the annular opening of the left target 101 among the three targets 101 in the broken line portion 111 is easily recognized.

  In this case, as the eighth number, for example, the astigmatic axis of the subject can be indicated by the direction “up”, in other words, “180 degrees”. Further, as the ninth number, for example, the visual function of the subject can be indicated by a viewing angle “5” or a visual acuity “0.2”. In addition, as the tenth number, for example, the visual function of the subject may be indicated by a viewing angle “5” or a visual acuity “0.2” in the astigmatic axis “180 degrees”, or a new number that is a combination thereof. it can.

The technology for providing the target set 1 is not particularly limited as long as the right eye image and the left eye image can be provided for the right eye, but the target set 1 is provided below. An example of the technique to perform is demonstrated. In addition, below, the same code | symbol is provided to the same thing and description is abbreviate | omitted.
<First embodiment>
First, an example when the target set 1 is provided as a sheet-like medium will be described.

  FIG. 4 is a schematic diagram for explaining an inspection example in the case where each of the image for the right eye and the image for the left eye of the optotype set 1 shown in FIG. 1 is provided as a sheet-like or plate-like medium. As shown in an example in FIG. 4, the medium 401 has the visual target 101, and the subject 2 performs an examination in a binocular vision state at a position away from the medium 401 by a predetermined distance. Although the distance (viewing distance) between the medium 401 and the subject 402 is not particularly limited, for example, 3 m to 5 m can be considered. Further, the height of the medium 401 is preferably a height at which the subject 402 can reasonably see each target 101 in the medium 401, for example, equivalent to the height of the line of sight of the subject 402.

  Next, an example in which each of the right eye image and the left eye image is provided to each of the subject's right eye and left eye in the medium 401 shown in FIG. 4 as an example. FIG. 5 is a diagram illustrating a configuration example of the medium 401 illustrated in FIG. 4 in the first embodiment. As shown in FIG. 5, the medium 401 includes a base material 501, a target part 502, a lenticular lens part 503, and the like.

  The base material 501 may be any material as long as the target part 502 and the lenticular lens part 503 can be disposed, and the configuration, material, dimensions, and the like are not particularly limited. The substrate 501 may be paper, a resin sheet, a metal plate, or the like, for example. The substrate 501 may be omitted if there is no necessity in terms of the configuration and function of the target unit 502 and the lenticular lens unit 503, the usage environment of the medium 401, and the like.

  The optotype unit 502 represents each of the above-described optotypes 101, and the means for realizing it is arbitrary. For example, it may be drawn or printed on the back surface of the convex lens surface of the substrate 501 or the lenticular lens portion 503, or may be a seal or the like.

  The lenticular lens unit 503 is a lenticular lens formed into a sheet shape. Since the lenticular lens itself is known, details are omitted.

  The target part 502 and the lenticular lens part 503 will be described in detail. The target unit 502 includes right-eye images 511 and left-eye images 512 that are alternately arranged. In the example of FIG. 5, the right-eye image 511 is indicated by a hatched portion. Further, the right visual line 522 that is an area that can be viewed with the subject's right eye 521 is indicated by a solid line, and each of the left visual line 532 that is an area that can be viewed with the subject's left eye 531 is indicated by a broken line. As shown in FIG. 5, each of the right-eye image 511 and the left-eye image 512 shields the left-eye image 512 from the right visual line 522 by refraction of the convex lens of the lenticular lens unit 503, and the right-eye image 511 is left-eye. It arrange | positions so that it may shield from the eyes | visual_axis 532.

  In FIG. 5, only a part of the right visual line 522 and the left visual line 532 are shown for simplification, but are not limited to those shown in the figure.

  The right-eye image 511 and the left-eye image 512 are obtained by changing the right-eye image and the left-eye image shown in FIGS. 2A and 2B to the dimensions and arrangement of the convex lens of the lenticular lens unit 503, respectively. Accordingly, it is divided into strips and arranged. However, it may not be simply divided into strips. For example, it is reconfigured according to the size and arrangement of the convex lens of the lenticular lens unit 503, the installation environment of the medium 401, the size of the target 101, and the like. May be.

  One target 101 or a plurality of targets 101 may be included in one medium 401. When a single target is included in one medium 401, a plurality of media 401 may be presented to the subject according to the examination. Further, the number of targets 101 to be simultaneously presented on the medium 401 may be arbitrary. For example, as in the target set 1 shown in FIG. 1, a plurality of targets 101 are simultaneously presented, and one or more targets 101 are shown to the subject according to the test to be performed. At least one of the second inspection and the third inspection may be performed. Further, only the target 101 necessary for the examination may be presented. Presentation of the target 101 is arbitrary, and may be performed by an inspector or the like, or may be presented in a predetermined order or at random or a combination thereof by an arbitrary device or the like.

  The configurations of the target part 502 and the lenticular lens part 503 are not particularly limited, but may be optimized according to the state of the target 101, the examination state of the subject, and the like. Here, an example of the conditions of the target part 502 and the lenticular lens part 503 will be described. FIG. 6 is a diagram for explaining the conditions of the target part 502 and the lenticular lens part 503. When a known lens formula is applied to the present embodiment, “ab” in FIG. 6 corresponds to the width of each of the right eye image and the left eye image, and “a′−b ′” corresponds to the eye width of the subject. . Hereinafter, the width of each of the right-eye image and the left-eye image is referred to as “L”, and the eye width of the subject is referred to as “M”. Further, “A” in FIG. 6 corresponds to the thickness of the lenticular lens, and “B” corresponds to the viewing distance. The eye width of the subject may be 50 mm to 70 mm.

  First, the following formula 1 is a known lens formula.

1 / A + 1 / B = 1 / F (Equation 1)
Assuming that the refractive index of the lenticular lens is “n”, the actual optical distance of “A” can be considered as “nA”.

1 / nA + 1 / B = 1 / F (Equation 2)
It is conceivable that the lenticular lens of the present example has a focal length F expressed by the above formula 2. Hereinafter, this is referred to as a first condition.

  Further, as is known, the lens formula is derived from the fact that Δabo and Δa′b′o ′ are similar to each other.

ab: a′b ′ = bo: b′o ′ (Equation 3)
When Formula 3 is replaced with A, B, L, and M, Formula 4 is obtained.

L: M = A: B ・ ・ ・ ・ ・ ・ (Formula 4)
Similarly to the above, since the actual optical distance of “A” is considered as “nA”, the above equation 4 becomes the following equation 5.

L: M = nA: B (Equation 5)
It is conceivable that the relationship between the thickness of the lenticular lens of the present embodiment, the width of each of the right-eye image and the left-eye image and the like is expressed by the above formula 5. Hereinafter, this is referred to as a second condition.

  As configurations of the target part 502 and the lenticular lens part 503, those satisfying the first condition and the second condition are conceivable.

In the above example, the target portion 502 is drawn or printed on the back surface of the convex lens surface of the substrate 501 or the lenticular lens portion 503, or is a seal or the like. It may be realized by other techniques. For example, the visual target 101 may be displayed by projecting or transmitting a transparent, translucent, opaque sheet, or the like or a combination thereof with a light source. Further, for example, the visual target 101 may be displayed on the display device.
<Second embodiment>
Next, a second embodiment will be described. In the first embodiment, each of the right eye image and the left eye image is provided to each of the right eye and the left eye by a lenticular lens. However, in the second embodiment described below, a parallax barrier is used instead of the lenticular lens. To each of the right and left eyes. Since a part of 2nd Example is the same as the said 1st Example, below, only a different part is demonstrated in detail.

  FIG. 7 is a diagram illustrating a configuration example of the medium 401 illustrated in FIG. 4 in the second embodiment. As illustrated in FIG. 7, the medium 401 includes a base material 501, a target unit 502, a parallax barrier unit 703, and the like.

  As shown in FIG. 7, the parallax barrier unit 703 blocks the left eye image 512 with respect to the right visual line 522 and the right eye image 511 with respect to the left visual line 532. Similar to the lenticular lens unit 503, the parallax barrier unit 703 depends on the state of the target 101, the distance from the subject to the target set 1, the eye width of the subject, the angle of the subject's line of sight with respect to the medium 401, and the like. It is recommended to optimize the dimensions and arrangement.

Note that, similarly to the first embodiment, the target unit 502 may be realized by another technique. For example, similarly to the above, the target 101 may be displayed by projecting or transmitting a transparent, translucent, opaque sheet, or the like, or a combination thereof with a light source. Further, for example, the visual target 101 may be displayed on the display device. In the second embodiment having the parallax barrier unit 703, the presence of a light source on the back surface of the parallax barrier unit 703, such as the above projection or transmission, display device, etc., reduces the possibility that the subject will notice the parallax barrier unit 703. This is particularly effective.
<Third embodiment>
Next, a third embodiment will be described. In the third embodiment, an embodiment in which each of the right-eye image and the left-eye image is provided by the left-right image separation method will be described.

  FIG. 8 is a schematic diagram for explaining an inspection example in the case of using an apparatus that provides each of the right-eye image and the left-eye image of the target set 1 shown in FIG.

  In FIG. 8, the inspection apparatus 801 has an eyepiece unit 811, and the subject inspects the visual target 101 displayed on the inside of the inspection apparatus 801 by binocular vision by causing the eyepiece unit 811 to have an eye.

  FIG. 9 is a schematic diagram of a section A of the inspection apparatus 801 in FIG. The inspection apparatus 801 includes an eyepiece unit 811, a right-eye image unit 911, a left-eye image unit 921, a shielding unit 941, and the like.

  As described above, the eyepiece 811 is a part where the subject is eyepiece, and includes the right eyepiece 912 where the subject's right eye 521 is eyepiece and the left eyepiece 922 where the subject's left eye 531 is eyepiece.

  The right eye image unit 911 displays an image of the visual target 101 to be presented to the subject's right eye 521. The left-eye image unit 921 displays an image of the visual target 101 to be presented to the subject's left eye 531. Specifically, for example, the right-eye image unit 911 displays the image 211 and the like in FIG. 2B, and the left-eye image unit 921 displays the image 212 and the like in FIG. The right-eye image unit 911 and the left-eye image unit 921 are configured to simultaneously display images to be displayed on each. Thereby, the images displayed in each of the right eye 521 and the left eye 531 are presented without a time difference, and an image that can be stereoscopically viewed in binocular vision is provided to the subject. Any technique may be used in which each of the right-eye image unit 911 and the left-eye image unit 921 displays an image. For example, the image may be displayed by a slide or the like on which an image is printed or drawn. Further, for example, a transparent, translucent or opaque sheet or a combination thereof may be displayed by being projected or transmitted by a light source. Further, for example, it may be displayed on a display device.

  The shielding part 941 is configured to shield the left-eye image part 921 from the right visual line 522 and the right-eye image part 911 from the left visual line 532 with an opaque material or the like. As long as the shielding part 941 satisfies this shielding function, the material, shape, and other functions are not particularly limited. For example, the shielding part 941 shares all or part of the casing or other configuration of the inspection apparatus 801 and is integrated. It may be.

Note that the inspection apparatus 801 may be used for inspection of static vision. For example, in order to test the one eye vision of the right eye 521, only the right eye target 101 may be presented to the right eye 521 and the left eye target 101 may not be presented. For example, the optotype 101 may be displayed on the right-eye image unit 911 and the optotype 101 may not be displayed on the left-eye image unit 921, or a movable shielding unit may be used. The left-eye image portion 921 may be shielded from the left visual line 532 by (not shown). In the case of a one-eye vision test for the left eye 531, the reverse of these may be performed. Further, for the binocular vision test, at least a part of the shielding unit 941 is movable, and the right-eye image unit 911 or the left-eye image unit 921 or another new display unit (not shown) is used with both eyes. It may be possible to see.
<Fourth embodiment>
Next, a fourth embodiment will be described. The fourth embodiment is an example of a system having the medium 401 or the inspection apparatus 801 shown as an example in the first to third embodiments. Since the technique for providing the right eye image and the left eye image for the right eye is the same as described above, only different portions will be described in detail.

  FIG. 10 is a diagram illustrating a configuration example of a system including the medium 401 or the inspection apparatus 801. In FIG. 10, the inspection system 1001 includes a control device 1011, a display unit 1021, an input unit 1022, an output unit 1023, an input unit 1031, an output unit 1032, and the like.

  The display unit 1021 is not particularly limited as long as it provides a right-eye image to the subject's right eye and a left-eye image to the left eye, and may be the medium 401 or the inspection apparatus 801. However, it differs from the above in that the display and non-display of each of the plurality of targets 101 can be controlled by the control device 1011 or the like.

  The input unit 1022 and the output unit 1023 are used by the subject. The input unit 1022 inputs, for example, which direction the annular opening of the indicated target 101 is in, which of the plurality of indicated targets 101 appears to pop out and / or appears to retract. For example, a sound collecting device such as a button or a microphone, a keyboard, a mouse, or the like. The output unit 1023 outputs the inspection result, and is, for example, a display device, a printer, a speaker, or the like.

  The input unit 1031 and the output unit 1032 are used by the examiner. The input unit 1031 is used to input inspection instructions and the like, and is, for example, a sound collecting device such as a button or a microphone, a keyboard, a mouse, or the like. The output unit 1032 outputs a test subject's input results, test results, and the like, and is, for example, a display device, a printer, a speaker, or the like.

  The control device 1011 includes a storage unit 1041, a control unit 1042, an interface unit 1043, and the like. The storage unit 1041, the control unit 1042, the interface unit 1043, and the like are connected by an internal bus or the like. The storage unit 1041 stores the target information 1051 and the like. The control unit 1042 is, for example, an arbitrary arithmetic device or the like, and includes an inspection unit 1061, a determination unit 1062, and the like. The technique for realizing the inspection unit 1061, the determination unit 1062, and the like may be arbitrary, but is realized by executing a program (not shown) or the like stored in the storage unit 1041, for example. A display unit 1021, an input unit 1022, an output unit 1023, an input unit 1031, an output unit 1032, and the like are connected to the interface unit 1043.

  The optotype information 1051 will be described. The optotype information 1051 includes information about each optotype 101 and a visual function indicated by the optotype 101. FIG. 11 is a diagram illustrating an example of the target information 1051. In FIG. 11, the optotype information 1051 has an item number 1101, a viewing angle 1102, a stereoscopic parallax angle 1103, a section 1104, a direction 1105, an image 1106, and the like in association with each other. Note that FIG. 11 shows an example in which each optotype 101 has a viewing angle, a stereoscopic parallax angle, a segment, and the like as shown in the table 301 of FIG.

  Item number 1101 is identification information of the target 101. The viewing angle 1102 is the viewing angle of the annular opening of the target 101 indicated by the corresponding item number 1101. The stereoscopic parallax angle 1103 is the stereoscopic parallax angle of the visual target 101 indicated by the corresponding item number 1101. A section 1104 is a section of the protruding amount and the retracting amount of the target 101 indicated by the corresponding item number 1101. A direction 1105 is the direction of the annular opening of the visual target 101 indicated by the corresponding item number 1101. The image 1106 is information for providing the target 101 indicated by the corresponding item number 1101 to the display unit 1021. The image 1106 differs depending on the technology for displaying the visual target 101. For example, the visual target 101 is displayed by a medium on which an image is printed or drawn, a transparent, translucent or opaque sheet, or a combination of these. In the case of displaying the target 101, the display image data itself for displaying the target 101 or the display thereof is displayed, for example, when the target 101 is displayed on a display device or the like. The storage location of image data.

  Next, an operation example of inspection using the inspection system 1001 will be described. FIG. 12 shows an operation example of the control device 1011. In FIG. 12, the inspection unit 1061 performs a process for executing the inspection b (S1201).

  The inspection b is not particularly limited. For example, in the table 301 shown in FIG. 3 as an example, one or more of the visual targets 101 having the viewing angle “1” are displayed. A single target 101 may be displayed when the first test is performed, and a plurality of targets 101 may be displayed when the second test and / or the third test is performed. In this case, for example, the inspection unit 1061 refers to the target information 1051, searches for the item number 1101 whose viewing angle 1102 is “1”, reads the image 1106 associated with the corresponding item number 1101, The target 101 is displayed on the display unit 1021 based on the read information. Although the specific operation is arbitrary, when the image 1106 is a storage location of a medium, a sheet, or the like, the inspection unit 1061 operates, for example, a slide mechanism (not shown) based on the storage location. For example, information indicating the item number 1101 or the image 1106 is output to the input unit 1031 and the target 101 is displayed on the examiner. Further, for example, when the target 101 is displayed by a display device or the like, the inspection unit 1061 acquires and displays display image data or the like for displaying the target 101 based on the image 1106, for example. Output to the unit 1021.

  Next, the determination unit 1062 determines the result of the examination b based on the information input by the examiner using the input unit 1022 or the like or the information input by the examiner using the input unit 1031 and the target information 1051. (S1202).

  For example, in the case of performing the first inspection, the determination unit 1062 uses the information indicating the input direction and the direction of the annular opening of the single target 101 displayed in S1201 or S1201. If the direction of any one of the displayed targets 101 matches the direction of the annular opening, it is determined to be OK, and if it does not match, it is determined to be NG. In order to acquire the direction of the annular opening of the target 101 displayed in S1201, for example, the determination unit 1062 refers to the target information 1051 and corresponds to the item number 1101 searched by the examination unit 1061 in S1201. Obtained from direction 1105.

  For example, when performing the second inspection, the determination unit 1062 includes the information indicating the input target 101 and the most pop-out amount and / or retraction amount among the plurality of targets 101 displayed in S1201. If it matches a large one, it is determined to be OK, and if it does not match, it is determined to be NG. The determination unit 1062 refers to, for example, the target information 1051 and the inspection unit 1061 searches the target information 1051 to determine which of the plurality of targets 101 displayed in S1201 has a large pop-out amount and / or retraction amount. The section number 1104 corresponding to each of the item numbers 1101 is specified.

  For example, when the third examination is performed, the determination unit 1062 determines that the subject is NG if the direction of the annular opening is unrecognizable, and OK otherwise. The determination unit 1062 includes information indicating that the subject has recognized that the direction of the annular opening, the amount of protrusion, and / or the amount of retraction is unknown even in the first inspection and the second inspection. Or when it is input from the input unit 1031 or the like, it is determined as NG.

  Note that the determination unit 1062 may output the determination result of S1202 to the output unit 1032 or the like.

  If the result of determination in S1202 is OK, the inspection unit 1061 performs processing for executing inspection a (S1203). The inspection a is not particularly limited. For example, in the table 301 shown in FIG. 3 as an example, one or more of the visual targets 101 having the viewing angle “0.5” are displayed. Since this detailed operation example is the same as S1201 described above, a description thereof will be omitted. When the third inspection is performed, an output process described later may be executed without performing the process of S1203 and the like.

  Next, the determination unit 1062 determines the result of the test a based on information input by the subject using the unit 1022 or information input by the examiner using the input unit 1031 and the target information 1051. (S1204). Since this detailed operation example is the same as S1202, the description is omitted.

  If the result of determination in S1204 is OK, the determination unit 1062 outputs information indicating the visual function of the subject based on the determination result to the output unit 1023 and / or the output unit 1032 (S1205). Specifically, for example, it is determined that the visual function at the viewing angle “0.5” is satisfied, and the determination unit 1062 outputs at least one of the first number to the tenth number as the output unit 1023 and Output to the output unit 1032 or the like.

  FIG. 13 shows an example in which the determination unit 1062 displays information indicating the visual function of the subject on the screen. In FIG. 13, a screen 1301 is an example of a screen output by the determination unit 1062 to the output unit 1023 and / or the output unit 1032. This screen 1301 is displayed by display screen data or the like stored in the storage unit 1041 or the like.

  Returning to FIG. 12, when the result of the determination in S1204 is NG, the determination unit 1062 outputs information indicating the visual function of the subject based on the determination result to the output unit 1023 and / or the output unit 1032 or the like (S1206). ). Specifically, for example, it is determined that the visual function at the viewing angle “1” is satisfied, and the determination unit 1062 outputs at least one of the first number to the tenth number as the output unit 1023 and / or The data is output to the output unit 1032 or the like. Since this detailed operation example is the same as S1205 described above, a description thereof will be omitted.

  On the other hand, if the result of the determination in S1202 is NG, the inspection unit 1061 performs processing for executing inspection c (S1207). Although this inspection c is not particularly limited, for example, in the table 301 shown in FIG. 3 as an example, one or more of the visual targets 101 having the visual angle “2” are displayed. Since this detailed operation example is the same as S1201 described above, a description thereof will be omitted.

  Next, the determination unit 1062 determines the result of the test c based on information input by the subject using the unit 1022 or information input by the examiner using the input unit 1031 and the target information 1051. (S1208). Since this detailed operation example is the same as S1202, the description is omitted.

  If the result of determination in S1208 is OK, the determination unit 1062 outputs information indicating the visual function of the subject based on the determination result to the output unit 1023 and / or the output unit 1032 (S1209). Specifically, for example, it is determined that the visual function at the viewing angle “2” is satisfied, and the determination unit 1062 outputs at least one of the first number to the tenth number as the output unit 1023 and / or The data is output to the output unit 1032 or the like. Since this detailed operation example is the same as S1205 described above, a description thereof will be omitted.

  If the result of determination in S1208 is NG, the inspection unit 1061 performs processing for executing inspection d (S1210). The inspection d is not particularly limited. For example, in the table 301 shown in FIG. 3 as an example, one or more of the visual targets 101 having the visual angle “5” are displayed. Since this detailed operation example is the same as S1201 described above, a description thereof will be omitted.

  Next, the examination unit 1061 determines the result of the examination d based on information input by the subject using the unit 1022 or information input by the examiner using the input unit 1031 and the target information 1051. (S1211). Since this detailed operation example is the same as S1202, the description is omitted.

  If the result of determination in S1211 is OK, the determination unit 1062 outputs information indicating the visual function of the subject based on the determination result to the output unit 1023 and / or the output unit 1032 (S1212). Specifically, for example, it is determined that the visual function at the viewing angle “5” is satisfied, and the determination unit 1062 outputs at least one of the first number to the tenth number as the output unit 1023 and / or The data is output to the output unit 1032 or the like. Since this detailed operation example is the same as S1205 described above, a description thereof will be omitted.

  If the result of determination in S1211 is NG, the determination unit 1062 outputs information based on the determination result to the output unit 1023 and / or the output unit 1032 or the like (S1213). Here, the information output by the determination unit 1062 may be arbitrary, for example, information that does not satisfy the visual function at the viewing angle “5”, information that prompts a change in inspection conditions, such as a change in viewing distance, or the like. Since this detailed operation example is the same as S1205 described above, a description thereof will be omitted.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included. .

  For example, in the above description, a lenticular lens, a parallax barrier, a left-right image separation method, and the like are exemplified as techniques for providing a right-eye image and a left-eye image for the right eye, but the present invention is not limited thereto. For example, a polarizing filter, a frame sequential that divides the left and right images by time, or the like may be used, or any other technique may be used.

  Moreover, although the said 2nd test | inspection was based on which target 101 looked most popping out or withdrawing among several target 101, it is not necessarily restricted to this, For example, several target 101 It is also possible to inspect the visual function depending on whether or not the order of the projecting amount or the retracting amount of the target 101 is large (or small order). The frequency of this inspection can be considered in the same manner as the fourth to seventh numbers, for example.

  1: target set, 101: target, 401: medium, 801: inspection device, 1001: inspection system

Claims (8)

An inspection target,
A target portion having a plurality of targets, and
A shielding part,
Each of said optotype includes a left-eye image to be provided to the left eye and right eye images the subject is an image to be provided to the right eye of the subject, said right-eye image and the left eye image, the same The optotype image is disposed apart in the horizontal direction, and the optotype image has a characteristic portion having a size according to the viewing angle of the subject at a viewing distance from the subject,
Each of the visual targets included in the visual target portion has different horizontal distances between the right-eye image and the left-eye image,
The test target for inspection including a visual acuity value, wherein the shielding unit shields the image for the right eye from the left eye and shields the image for the left eye from the right eye. The inspection target according to claim 1,
The test target to be inspected including a visual acuity value, wherein each target of the target unit has a different size of the target image. The inspection target according to claim 1 or 2,
The test target to be inspected including a visual acuity value, wherein each target of the target unit has a different direction of the feature of each target. An inspection target according to any one of claims 1 to 3,
The shielding part is a lenticular sheet,
The test target for inspection including a visual acuity value, wherein the visual target unit alternately arranges the strip-shaped image for the right eye and the image for the left eye. An inspection target according to any one of claims 1 to 3,
The shielding part is a parallax barrier;
The test target for inspection including a visual acuity value, wherein the visual target unit alternately arranges the strip-shaped image for the right eye and the image for the left eye. An inspection target according to any one of claims 1 to 3,
The optotype part includes a right-eye image target part having the right-eye image, and a left-eye image target part having the left-eye image,
The test target for inspection including a visual acuity value, wherein the shielding unit shields the image target unit for the right eye from the left eye and shields the image target unit for the left eye from the right eye. An inspection system comprising the inspection target according to any one of claims 1 to 6,
A storage unit that stores each visual target and visual function information indicating a visual function of each visual target;
An acquisition unit for acquiring information indicating one of the plurality of visual targets;
A control unit that acquires the visual function information in the target indicated by the acquired information from the storage unit;
An output unit for outputting the acquired visual function information;
An inspection system for inspecting including visual acuity measurement, further comprising: An inspection target,
A target portion having a plurality of targets, and
A shielding part,
Each of the targets is
And a left-eye image to be provided to the right eye image and the left eye of the subject is an image to be provided to the right eye of the subject, said right-eye image and the left eye image, the same target image in the horizontal direction Arranged apart from each other, and the target image has a feature portion having a size corresponding to a viewing angle of the subject at a viewing distance from the subject,
Each target of the target unit has a different size of the target image,
The test target for inspection including a visual acuity value, wherein the shielding unit shields the image for the right eye from the left eye and shields the image for the left eye from the right eye.

Images