JP7374418B2 - optometry equipment - Google Patents

Description

The present invention relates to a small and lightweight portable optometry device that is used in combination with a portable terminal device such as a smartphone.

Conventionally, there have been a wide variety of optometry devices depending on the purpose of optometry and medical examination. As an example, a slit lamp microscope that uses a slit lamp that projects a slit-shaped illumination light spot onto the eye of a subject is generally used as an examination instrument that is the basis of ophthalmological examination.

According to such a slit lamp microscope, various lesion sites can be observed by providing diversity in the method of illuminating the eye to be examined. In other words, by irradiating the subject's eye with light from a slit lamp light source while changing the angle, color, and width, the external eye part (eyelids, conjunctiva, sclera), anterior eye part (cornea, Abnormalities in the anterior chamber, crystalline lens), anterior vitreous body, and fundus structure can be identified.

Here, for example, Patent Document 1 discloses a slit lamp microscope capable of acquiring a wide-area image of an eye to be examined. The slit lamp microscope of Patent Document 1 includes an illumination system and an imaging system, the illumination system includes an illumination focusing mechanism, and the illumination system illuminates the eye to be examined with slit light. The illumination focusing mechanism is used to change the focus position of the slit light, and the imaging system plays the role of guiding the return light of the slit light from the subject's eye to the imaging device.

On the other hand, the slit lamp microscope has a hand slit as a portable type, and this also allows examination of the external eye segment, anterior eye segment, fundus, etc.

JP 2016-159073 Publication

However, the slit lamp microscope disclosed in Patent Document 1 is a stationary device, and the overall size and weight of the device are large, making it unsuitable for portability.

On the other hand, the portable hand slit mentioned above was developed for ophthalmologists, but has problems such as being difficult to operate, heavy, and expensive. It has become difficult to use it.

In recent years, as the number of patients living at home has increased and there are hundreds of municipalities without ophthalmologists, general practitioners and emergency physicians are increasingly examining patients complaining of ophthalmological symptoms at home or in remote areas. There is. For example, anterior segment examination is essential for diagnosis of ophthalmological emergencies such as acute glaucoma attacks, but even if a facility has a hand slit, it may not be possible for non-ophthalmologists to use it. Under such circumstances, it is desired to realize a portable optometry device that is easy to operate, small in size, lightweight, and low in cost.

The present invention has been made in view of these problems, and its purpose is to provide a portable optometry device that is small, lightweight, and has good operability and is used in combination with a portable terminal device. It is about providing.

In order to solve the above problems, a first aspect of the present invention provides an optometry device used together with a portable terminal device, which includes a flat plate on which the portable terminal device comes into contact, and a an abutting unit disposed on the flat plate, a photographing optical system disposed on the flat plate, and an illumination unit disposed on the flat plate, and the abutting unit can adjust its positional relationship to a focal length of the photographing optical system is defined, the abutting unit includes an upper abutting unit and a lower abutting unit, each of the upper abutting unit and the lower abutting unit being fixed to the flat plate; It consists of a shaft and one or more rotating rollers rotatably disposed at the tip of the shaft.

According to the present invention, it is possible to provide a portable optometry device that is small, lightweight, and has good operability and is used in combination with a portable terminal device.

1 is a configuration diagram of an optometry apparatus according to an embodiment of the present invention. 1 is a configuration diagram of an optometry apparatus according to an embodiment of the present invention. It is a sectional view taken along the line AA in FIG. 2(b). FIG. 7 is a diagram illustrating another detailed configuration example of the contact unit.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a perspective view of an optometry device according to an embodiment of the present invention, FIG. 2(a) shows a plan view of the optometry device, and FIG. 2(b) shows a front view of the optometry device. FIG. 2(c) shows a side view of the optometric apparatus, and FIG. 3 shows a partial cross-sectional view of the optometric apparatus. Note that FIG. 3 corresponds to a cross-sectional view taken along line AA in FIG. 2(b).

As shown in these figures, the optometry device 1 includes a flat plate 2 . The flat plate 2 includes a first flat plate part 2a and a second flat plate part 2b extending above the first flat plate part 2a in a direction perpendicular to the plane of the first flat plate part 2a. A support plate 3 is fixed to the second flat plate portion 2b, and a lighting unit 4 is disposed on the plane of the support plate 3. In addition, in the structure not provided with the support plate 3, the illumination unit 4 may be arrange|positioned directly to the 2nd flat plate part 2b.

A power supply unit 6 is disposed on the upper right side of the first flat plate portion 2a when viewed from the subject direction, and a battery is housed in the power supply unit 6. Power is supplied from this power supply section 6 to the light source within the lighting unit 4. The power supply section 6 is provided with a light source switch 13 that adjusts the brightness of the illumination. By rotating the light source switch 13, it is possible to increase or decrease the brightness of the illumination.

An upper contact unit 7 is disposed on the upper left side of the support plate 3 when viewed from the subject direction. The upper contact unit 7 includes a shaft member 7a that is positioned with respect to the support plate 3 by an adjustment member 7e, and a rotating roller 7c that is rotatably disposed at the tip of the shaft member 7a about a rotating shaft member 7b. It consists of A long slit 7d is formed in the plane of the shaft member 7a. The adjustment member 7e adjusts the positional relationship between the shaft member 7a and the support plate 3 while changing the relative position in the slit 7d, and adjusts the shaft member relative to the support plate 3 at a position where the length is suitable for photographing. Fix 7a.

On the other hand, a lower contact unit 8 is disposed at the upper left side of the first plane portion 2a when viewed from the subject direction. The lower contact unit 8 includes a shaft member 8a positioned with respect to the support plate 5 by an adjustment member 8e, and a rotating roller disposed at the tip of the shaft member 8a so as to be rotatable about a rotating shaft member 8b. It consists of 8c. A long slit 8d is formed in the plane of the shaft member 8a. The adjustment member 8e adjusts the positional relationship between the shaft member 8a and the support plate 5 while changing the relative position in the slit 8d, and adjusts the shaft member relative to the support plate 5 at a position where the length is suitable for photographing. Fix 8a.

In this example, in the upper contact unit 7, a rotating roller 7c is rotatably held on the upper surface of the tip of the shaft portion 7a by the rotating shaft member 7b, and in the lower contact unit 8, the rotating roller 7c is rotatably held on the upper surface of the tip of the shaft portion 8a. A rotating roller 8c is rotatably held by a rotating shaft member 8b. However, this is just an example, and the rotating roller 7c may be disposed on the lower surface of the tip of the shaft portion 7a, and the rotating roller 8c may be disposed on the upper surface of the tip of the shaft portion 8a. Further, instead of the rotating rollers 7c and 8c, a configuration in which a spherical ball member is movably held by a support portion may be adopted.

In this embodiment, the upper contact unit 7 functions as a forehead rest, and the lower contact unit 8 functions as a cheek rest, and these two points prevent the focal length of the imaging optical system 9 with respect to the subject from shifting. The optometry device 1 can be positioned. Thereby, the photographing function of the portable terminal device used in combination enables highly accurate photographing of the subject's eye. Depending on the type of optometry, for example, when examining the fundus of the eye, the length of the upper contact unit 7 can be adjusted by adjusting the positional relationship between the support plate 3 and the shaft member 7a, and the desired focal point can be achieved. The distance can be set. Furthermore, by adjusting the positional relationship between the support plate 5 and the shaft member 8a, the length of the lower contact unit 8 can be adjusted and set to a desired focal length. In the case of fundus examination, it is sufficient to adjust the focal length so that it is set further back toward the eye to be examined than on the line connecting the abutment positions of the tips of the upper abutment unit 7 and the lower abutment unit 8. .

A photographing optical system 9 is disposed at the upper left side of the first flat plate portion 2a when viewed from the subject side. As shown in FIG. 3, the photographing optical system 9 is, in detail, composed of a combination of a concave lens 9a and convex lenses 9b and 9c, that is, a doublet. With this configuration, chromatic aberration can be well corrected. The configuration of the photographing optical system 9 is merely a series, and various configurations can be adopted.

A holding portion 10 is provided at the left end of the first flat plate portion 2a when viewed from the subject side, that is, approximately at the center of the left edge of the first flat portion 2a. The holding portion 10 includes a substantially L-shaped holding plate 10a and an adjustment holding member 10b for fixing the holding plate 10a to the first flat plate portion 2a. The holding plate 10a is positioned such that a first plane contacts a plane of the first flat plate part 2a, and a second plane extending perpendicularly from the first plane projects toward the rear of the first flat plate part 2a. In this regard, it is positioned and fixed relative to the first flat plate portion 2a by the adjustment holding member 10b. The adjustment holding member 10b is positioned relative to the first flat plate portion 2a at a position suitable for holding the portable terminal device while changing its relative position within the slit 10c provided on the first plane of the holding plate 10a. Fix the holding plate 10a.

A holding portion 11 is provided at the right end of the first flat plate portion 2a when viewed from the subject side, that is, approximately at the center of the right edge of the first flat portion 2a. The holding part 11 includes a substantially L-shaped holding plate 11a and an adjustment holding member 11b for fixing the holding plate 11a to the first flat plate part 2a. The holding plate 11a is positioned such that a first plane abuts the plane of the first flat plate part 2a, and a second plane extending perpendicularly from the first plane projects toward the rear of the first flat plate part 2a. In this regard, it is positioned and fixed relative to the first flat plate portion 2a by the adjustment holding member 11b. The adjustment holding member 11b is positioned relative to the first flat plate portion 2a at a position suitable for holding the portable terminal device while changing its relative position within the slit 11c provided on the first plane of the holding plate 11a. Fix the holding plate 11a.

A holding portion 12 is provided at the lower end of the first flat plate portion 2a when viewed from the subject side, that is, approximately at the center of the lower edge of the first flat portion 2a. The holding portion 12 includes a substantially L-shaped holding plate 12a and an adjustment holding member 12b for fixing the holding plate 12a to the first flat plate portion 2a. The holding plate 12a is positioned such that a first plane contacts the plane of the first flat plate part 2a, and a second plane extending perpendicularly from the first plane projects toward the rear of the first flat plate part 2a. In this regard, it is positioned and fixed relative to the first flat plate portion 2a by the adjustment holding member 12b. The adjustment holding member 12b is positioned relative to the first flat plate portion 2a at a position suitable for holding the portable terminal device while changing its relative position within the slit 12c provided on the first plane of the holding plate 12a. Fix the holding plate 12a.

It is also possible to take pictures while holding the portable terminal device by hand against the first flat plate portion 2a without providing these holding portions 10, 11, and 12. It is also possible to replace the holding parts 10, 11, and 12 with other members.

A fixing part 14 is fixed by a screw 14a on the plane (above the lid) of the power supply part 6 disposed on the first flat plate part 2a. A fixing part 15 is fixed by a screw 15a to the lower left side of the first flat plate part 2a when viewed from the subject side. Both ends of the belt member 16 are held by the two fixing parts 14 and 15, respectively. This belt member 16 realizes stable photographing when the photographer inserts his or her hand between the belt member 16 and the first flat plate portion 2a when using the optometry apparatus 1.

When the lighting unit 4 functions as a slit lamp, it has the following configuration. That is, the lighting unit 4 employs a white LED as a light source, and the light source is connected to the power supply section 6. The power supply section 6 supplies power to the light source from an internal battery or the like. A condenser lens (not shown), a first filter section, a second filter section, a projection lens, and an illumination prism are arranged in this order on the optical path of the light emitted from the light source. A color filter is provided on the exit surface of the illumination prism so as to be openable and closable.

Light from a white LED, which is a light source, is condensed by a condenser lens and guided to a projection lens via a first filter section and a second filter section. Then, the light is projected onto the illumination prism by the projection lens, the optical path is changed forward by the illumination prism, and an image is formed at a predetermined focal position. At this time, a diffuser function can be realized by installing a filter made of translucent frosted glass in front of the illumination prism. The filter section may include a first filter section with a color filter function and a second filter section in which a slit is formed. Incidentally, these may be of a so-called cartridge type, and may be replaced by simply inserting a filter of a desired color (for example, blue) or a filter of a desired slit shape into the unit.

In such a configuration, when actually used, the lengths of the upper contact unit 7 and the lower contact unit 8 are adjusted by loosening the adjusting members 7e and 8e, and the relative positions of the slits 7f and 8f are adjusted. The adjustment is made by changing the position and tightening the adjustment members 7e and 8e at the desired position. Subsequently, the portable terminal device is placed against the back surface of the first flat plate portion 2a (the side opposite to the surface on which the photographing optical system is disposed), and the holding portions 10 to 12 are adjusted and fixed. At this time, the lens of the camera of the portable terminal device is positioned on the rear surface of the photographing optical system 9. In addition, in the case of a configuration that does not include the holding parts 10 to 12, the eye to be examined is photographed while the portable terminal device is placed against the first flat plate part 2a.

After performing the above positioning, the light source switch 13 is rotated to adjust the light emission intensity of the light source. Then, with the light of the illumination unit 4 being projected onto the eye to be examined, the eye to be examined is photographed via the photographing optical system 9 using the camera function of the portable terminal device. During this imaging, the upper contact unit 7 is brought into contact with the subject's forehead, and the lower contact unit 8 is brought into contact with the patient's cheek, so the positional relationship between the photographing optical system 9 and the subject's eye is is fixed, and the focal length remains unchanged, allowing for highly accurate photography. Furthermore, since the tips of the upper abutment unit 7 and the lower abutment unit 8 are rotary rollers 7c and 8c, the optometry device can be stably moved from side to side to scan from the abutted state. When the illumination unit 4 is a slit lamp, the eye can be examined stably, that is, without the focal length changing, as in the case of a stationary type. Further, due to the above-mentioned stable movement, even when switching between left and right eye examinations, it is only necessary to move stably in the lateral direction using the rotary rollers 7c and 8c, which is convenient.

Next, FIGS. 4(a) and 4(b) show another example of the configuration of the contact unit of the optometry apparatus according to an embodiment of the present invention, and will be described.

In the example shown in FIG. 4(a), the protrusion length of the shaft member 21 from the support plate 22 can be adjusted, and the shaft member 21 is divided into two parts, a straight part 21a and a straight part 21a. It consists of a first branching end portion 21b and a second branching end portion 21c which are branched and extended. A rotating roller 23 is rotatably held at the tip of the first branch end portion 21b by a rotating shaft member 23a. At the tip of the second branch end portion 21c, a rotating roller 24 is rotatably held by a rotating shaft member 24a. Such a contact unit can be applied to both the upper and lower parts, and since it contacts the forehead or cheek at two points, it is possible to prevent focal length blurring with higher precision. . Furthermore, when positioning the optometry device, it is possible to flexibly accommodate the irregularities of the forehead or cheeks of the subject.

In the example shown in FIG. 4(b), the protrusion length of the shaft member 31 from the support plate 32 can be adjusted, and the shaft member 31 is divided into three parts: a straight part 31a and a straight part 31a. It consists of a first branching end portion 31b, a second branching end portion 31c, and a third branching end portion 31d which are branched and extended. A rotating roller 33 is rotatably held at the tip of the first branch end portion 31b by a rotating shaft member 33a. At the tip of the second branch end portion 31c, a rotating roller 34 is rotatably held by a rotating shaft member 34a. At the tip of the third branch end portion 31d, a rotating roller 35 is rotatably held by a rotating shaft member 35a. A contact unit with such a configuration can be applied to both the upper and lower parts, and it can contact the forehead or cheek at one to three points out of three points, so it can reduce focal length blur. Preventable with high precision. Furthermore, when positioning the optometry device, it is possible to flexibly accommodate the irregularities of the forehead or cheeks of the subject.

In this other example, a contact unit provided with two or three rotating rollers was illustrated, but it may also be configured to include a plurality of rotating rollers. Furthermore, if the second shaft members 21 and 31 are made of flexible resin or the like, it is possible to flexibly adjust the contact relationship between the plurality of rotating rollers when the rotating rollers are in contact with each other. Become.

As explained above, according to the optometry device according to the embodiment of the present invention, it is used in combination with a portable terminal device, the rotating roller of the upper abutting unit is brought into contact with the forehead, and the rotating roller of the lower abutting unit is rotated. By applying the movable roller to the cheek, the patient's eye can be adjusted so that it is positioned between the contact positions of the upper contact unit and the lower contact unit, so that the luminous flux of the illumination unit can be accurately guided to the patient's eye. The eye to be examined can be photographed with high precision by the camera of the portable terminal device via the photographing optical system. At this time, the upper abutting unit and the lower abutting unit prevent the focal length of the photographing optical system from blurring, making it possible to take more accurate photographs. Note that depending on the type of eye examination, the positional relationship between the eye to be examined and the photographing optical system may be adjusted and set by bringing only one of the upper contact unit or the lower contact unit into contact with the forehead or cheek.

Note that since the rotary roller is made of resin such as silicone, the rotating roller does not make the subject feel uncomfortable when it comes into contact with the subject's forehead or cheek.

Although one embodiment of the present invention has been described above, the present invention is not limited thereto, and various improvements and changes can be made without departing from the spirit thereof.

For example, in the embodiment described above, an example was shown in which the illumination unit is rotatably disposed at the top of the optometry device, but the illumination unit is not limited to this, and the illumination unit may be rotatably disposed at the bottom or side of the optometry device. Of course, you can do it this way.

DESCRIPTION OF SYMBOLS 1... Optometric device, 2... Flat plate, 2a... First flat plate part, 2b... Second flat plate part, 3... Support plate, 4... Lighting unit, 5... Support plate, 6... Power supply part, 7... Upper contact unit, 7a... Shaft part, 7b... Rotating shaft member, 7c... Rotating roller, 7d... Slit, 7e... Adjusting member, 8... Lower contact unit, 8a... Shaft part, 8b... Rotating shaft member, 8c... Rotating roller, 8d...Slit, 8e...Adjustment member, 9...Photographing optical system, 9a...Concave lens, 9b...Convex lens, 9c...Convex lens, 10...Holding section, 10a...Holding plate, 10b...Adjustment holding member, 10c...Slit, 11...Holding Part, 11a... Holding plate, 11b... Adjustment holding member, 11c... Slit, 12... Holding part, 12a... Holding plate, 12b... Adjustment holding member, 12c... Slit, 13... Light source switch, 14... Fixing part, 14a... Screw , 15... Fixed part, 15a... Screw, 16... Belt member, 20... Contact unit, 21... Shaft member, 21a... Straight line part, 21b... First branch end part, 21c... Second branch end part, 22... Support Plate, 23... Rotating roller, 23a... Rotating shaft member, 24... Rotating roller, 24a... Rotating shaft member, 30... Contact unit, 31... Shaft member, 31a... Straight part, 31b... First branch point, 31c...Second branch end, 31d...Third branch end, 32...Support plate, 33...Rotating roller, 33a...Rotating shaft member, 34...Rotating roller, 34a...Rotating shaft member, 35...Rotating roller , 35a...rotating shaft member.

Claims (2)

An optometry device used with a portable terminal device,
a flat plate against which the portable terminal device is brought into contact;
a contact unit disposed on the flat plate;
a photographing optical system disposed on the flat plate;
a lighting unit disposed on the flat plate;
Equipped with
The contact unit defines a focal length of the photographing optical system with respect to the eye to be examined by adjusting the positional relationship ,
The abutment unit includes an upper abutment unit and a lower abutment unit, and the upper abutment unit and the lower abutment unit each include a shaft fixed to the flat plate and a shaft rotatable at the tip of the shaft. Consists of one or more rotating rollers that are movably arranged
Optometry equipment. The optometric apparatus according to claim 1 , wherein the illumination unit is a slit lamp unit.

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