JP3354964B2 - Visual function testing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visual function testing apparatus, and more particularly, to a visual function testing apparatus such as a subjective optometric apparatus for performing a visual function test of an eye to be examined.

[0002]

2. Description of the Related Art In a subjective optometry apparatus for visually inspecting an eye to be examined in a subjective manner, it is supported by a near point bar rotatably attached to an optometry means (vision tester) for inspecting the visual function of the eye to be examined. In general, a near vision test is performed by inserting a near vision target into the optical path leading to the optometry unit.

[0003]

However, in the case of the above-mentioned conventional subjective optometry apparatus, the near-point bar supporting the near vision target is located at a position where it is difficult for the examiner to reach the operability. There was a problem of bad. Also, the perimeter bar is quite long, so it will draw a large arc trajectory during operation,
There is a problem that a considerable space is required and space cannot be saved.

Further, in the case of a conventional subjective optometry apparatus, the near vision target is always located at a predetermined position in front of the optometry means and cannot move or move up and down. There is a problem that accuracy cannot be expected in a case where a visual function test is performed by mounting the device.

Conventionally, an attempt has been made to allow a subject to read a newspaper or the like to perform a near vision test. However, in this case, it is not suitable for testing the adjustment force range of the subject's eye. .

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a visual function inspection apparatus which has good operability, can save space, and can ensure the accuracy of a visual function test.

[0007]

According to the first aspect of the present invention,
Optometry means for performing a visual function test arranged on a table ,
It includes a reflecting member is opposed to the eye means, in the vision test apparatus and a target optical system for forming an optical path for guiding the light beam to said eye means via the reflection member from the far vision target, on said table Vertically movable support
Is supported by this support and can be inserted into and removed from the optical path.
And closer to or separated from the optometry means
Movement and tilting movement are independent of the vertical movement.
And a near vision target that is configured to be able to be operated .

According to a second aspect of the present invention, the reflecting member comprises:
The near vision target is supported by the supported support.
It is characterized by having comprised in .

[0009]

The operation of the visual function inspection apparatus having the above-described configuration will be described below.

When performing a near vision test with this visual function testing device, a near vision target is provided independently of the optometry means.
Can be moved up and down by being supported by
Movement in the direction approaching or separating from the means, and tilting
The operation can be performed separately from the vertical movement. This allows
Adjust the position of the near vision target into the optical path to the optometry unit and insert it.
Operability of the near vision target is improved.

In addition, a cumulative lens is mounted on the test frame.
When performing a visual function test, make sure that it is perpendicular to the visual axis.
It is possible to make arrangements, and to ensure accuracy
Wear.

[0012] Further, a supporting member in which the reflecting member is the same as the near vision target
The near vision target is arranged along the reflective member.
Can save space compared to the conventional example.
You.

[0013]

Embodiments of the present invention will be described below in detail.

The visual function inspection apparatus 1 shown in FIG. 1 includes an optometry table 2 having an L-shaped planar shape.

A column 4 is erected at the end of the optometry table 2, and an arm 5 attached to the column 4 supports a optometry unit 6 for subjective optometry. The reflecting member 3 with the external mirror 7 constituting the optotype optical system 10 is opposed to the eye examining means 6 near the eye examining window 6a.

Also, as shown in FIG. 1, inside the optometry table 2, a visual acuity table display means 8 for displaying a distance visual target such as a Landolt mark M for visual function inspection, and this visual acuity table display means An opening 9 provided in the optometry table 2 with a light beam from
Target optical system 1 that reflects light from the mirror toward the external mirror 7
The first to fifth mirrors 13 to 17 are disposed.

That is, the optotype optical system 10 includes a first mirror 13 facing the visual acuity table display means 8 and the first mirror 1.
A second mirror 14 disposed below the third mirror 3, a third mirror 15 for reflecting the light beam from the second mirror 14 upward,
A fourth mirror 16 that reflects the light beam from the third mirror 15 in the same direction as the table surface of the optometry table 2, and reflects the light beam from the fourth mirror 16 toward the external mirror 7 through the opening 9. And a fifth mirror 17.

As shown in FIG. 2, the reflecting member 3 has a rotating cylinder 3a at an end thereof, and the rotating cylinder 3a is horizontally moved from a vertical support 21 erected from the optometry table 2. It is fitted to a horizontal arm 22 projecting in the direction. The vertical support 21 is driven vertically in a vertical direction by a vertical drive unit (not shown).

On the back side of the reflecting member 3, a chart plate 25 provided with a near target is supported along the reflecting member 3 and a chart provided with a near target in a moving area of the reflecting member 3. A near visual target presenting mechanism 26 is provided for inserting and removing the plate 25 in the optical path to the optometry unit 6 in a state where the plate 25 can be adjusted.

The near visual target presenting mechanism 26 includes a pair of guide rails 27a and 27b arranged in parallel on the back side of the reflecting member 3 at an interval, and the guide rails 27a and 27b.
b, and a slide 28 which is guided in a direction approaching or separating from the optometry means 6.
The end portion of the chart plate 25 is rotatably mounted on the control panel. Further, a scale 29 is attached to the guide rail 27a as a guide for knowing the movement position of the chart plate 25.

With such a configuration, the chart plate 25 provided with the near vision target is, as shown in FIG.
On the back side of the reflecting member 3, it is possible to move in a direction (X1, X2 directions) approaching or separating from the optometry means 6 and, as shown in FIG. I have.

Next, the operation of the visual function inspection apparatus 1 will be described mainly with reference to the operation of the near visual target presenting mechanism 26 and also with reference to FIGS.

In the visual function test apparatus 1, when performing a far test of the eye E, the near visual target presenting mechanism 26 is not operated, and as shown in FIG. 7 is opposed to the optometry means 6. As a result, the light beam from the visual acuity table display means 8 passes through the first mirror 13, the second mirror 14, the third mirror 15, the fourth mirror 16, the fifth mirror 17, and then reaches the external mirror 7. The light enters the eye E through the optometry unit 6 from the external mirror 7. Thereby, the far vision inspection of the eye E can be performed.

On the other hand, when performing a near-inspection of the eye E, as shown in FIG. 4, the reflecting member 3 is slightly lowered from the side of the optometry means 6 to be horizontally arranged. Then, the near vision target presenting mechanism 26 is operated to displace the slide body 28 along the guide rails 27a and 27b using the scale 29 as a guide, and the chart plate 25 is vertically arranged with the slide body 28 as a fulcrum. The near vision target attached to the chart plate 25 is made to face the optometry unit 6. Thus, the near-inspection of the eye E can be performed with good operability only by a simple operation of the chart plate 25. Further, since the chart plate 25 is arranged along the reflection member 3, it is possible to save space as compared with the conventional example.

When a near-inspection is performed by wearing a test frame 30 having a progressive lens mounted on the eye E,
As shown in FIG. 5, the optometry unit 6 is removed, and the chart plate 2 is removed.
5 can be set in the direction of the arrow α so that the line of sight of the eye to be examined E that has passed through the progressive lens is vertically incident on the near target. Accordingly, when a visual function test is performed by attaching a progressive lens to the test frame 30, the accuracy can be improved.

Next, another example of the near visual target presenting mechanism 26 will be described with reference to FIGS.

The near visual target presenting mechanism 26A shown in FIG.
The chart plate 40 provided with the near target is configured to be independent of the reflecting member 3.

That is, the near visual target presenting mechanism 26A has a movable support 41 attached to the vertical support 21 so as to be displaceable in the vertical direction by electric or manual operation, and projects from the movable support 41 in the horizontal direction. A horizontal arm 42 provided and a rotating body 43 rotatably fitted to the horizontal arm 42 are provided, and one end of a chart plate 40 provided with a near visual target is attached to the rotating body 43.

In the case of the near visual target presenting mechanism 26A having this configuration, as shown in FIG. 7, the near visual target presenting mechanism 26A is kept with the external mirror 7 of the reflecting member 3 facing the optometry means 6.
Is operated to lower the movable support 41 to a predetermined position below the reflecting member 3, and rotate the rotating body 43 and the chart plate 40 by almost one turn, thereby moving the near target attached to the chart plate 40 to the external mirror 7. The near vision examination of the eye E can be performed over a wider examination distance than the near vision target presenting mechanism 26. That is, it becomes possible to cope with a near-inspection test of each eye E to be examined having individual differences.

The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the invention.

According to the present invention described in detail above, the near vision target is positioned on the optical path to the optometry means because of the above-described configuration.
Can be inserted after adjustment, and good operability of near vision target
And add a cumulative lens to the test frame
When performing a visual function test, arrange so that it is perpendicular to the visual axis.
Thus, it is possible to provide a visual function inspection device capable of ensuring accuracy .

Further, according to the present invention, the reflecting member can be used for near vision.
Because it was configured to be supported by the same support as the target,
The marker can be placed along the reflective member, saving space compared to the conventional example.
And a visual function inspection device capable of improving the visual performance.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a reflecting member and a near vision target presenting mechanism of the apparatus of the embodiment.

FIG. 3 is a partially enlarged view showing a state of a long-distance inspection of the apparatus of the embodiment.

FIG. 4 is a partially enlarged view showing a state of a near vision inspection of the apparatus of the present embodiment.

FIG. 5 is a partially enlarged view showing a state of a near vision inspection using a test frame of the apparatus of the present embodiment.

FIG. 6 is a perspective view showing another example of the near visual target presenting mechanism of the apparatus of the present embodiment.

FIG. 7 is an operation explanatory diagram of another example of the near visual target presenting mechanism of the apparatus of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Visual function test apparatus 2 Optometry table 3 Reflection member 6 Optometry means 7 External mirror 8 Optotype display means 10 Optotype optical system 25 Chart board 26 Near-point optotype presenting mechanism

Claims (2)

(57) [Claims] And 1. A optometry means for performing view placed on a table function test includes a reflecting member is opposed to the eye means, said analyzing the light beam from the distance optotype through the reflecting member <br / > in visual function testing device and a target optical system for forming an optical path for guiding the eye means, erected on the table up and down
Movable support, and supported by and supported by the support
It can be inserted into and removed from the optical path and is close to the optometry unit.
Or, the movement in the direction of separation and the tilting movement
A visual function inspection device , comprising: a near vision target configured to perform movement independently . 2. The reflecting member is supported by the near vision target.
2. The visual function inspection apparatus according to claim 1, wherein the visual function inspection apparatus is configured to be supported by the support .