JPH04200434A - Eye inspector - Google Patents

Abstract

PURPOSE:To achieve an inspection of sphericity efficiently by placing a specified combination lens of auxiliary lenses into an optical axis at a final stage of a self-aware type inspection of an eye of a person to be inspected to allow the viewing of a target simultaneously with action of the auxiliary lenses and the combination lens. CONSTITUTION:For example, when a right eye E is inspected, spherical lenses 10 and 11 are combined to be set at an optometric window 5A separately. In the final stage of determining sphericity, the auxiliary lenses, for example, a combination of those 0D and 0.25D is positioned at the optometric window 5A. As to the right eye E. an image of a specified target 20 is separated into two with action of an apex prism 15 and one thereof is seen as intact with both semi-circular lenses 14a and 14b while the other is seen simultaneously being weakened by 0.25 D. The person to be inspected reports a lens easy to view and, for example, when the image of the target 20 is seen through the lens 14b of 0.25D, the sphericity of the spherical lens 11 is reduced. When the image is seen through the other lens of 0D, the sphericity is increased. By repeating this operation, truer sphericity of the eye E is determined.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention relates to an optometric apparatus, and more particularly, to an optometric apparatus that performs a subjective test of the spherical power, etc., of the eyes of a subject. .

(Prior art) In a subjective optometry device, in the final stage of a monocular spherical power test, a red-green optotype is shown to the examiner through the optometry window of the optometry device, and each of the red side and edge side is examined. Usually, the sharpness of the optotypes is compared, or a specific visual acuity chart is shown to the subject, and the spherical lens is replaced so that the specific optotype on the chart is visible at the weakest spherical power. It is.

(Problem to be Solved by the Invention) However, with the method of showing the red-green optotype to the examinee, there is a problem in that it is impossible to test the spherical power of the examinee who has color blindness to red or green eyes. There is.

Furthermore, this method has a strong implication that a complete correction value is determined based on the hue of the optotype at the final stage.

On the other hand, in the method of replacing spherical lenses, spherical lenses with different spherical powers are replaced one after another, so simultaneous viewing through multiple spherical lenses is not possible, and the test method relies on the subject's memory. There is a problem in that the operator has to replace the spherical lens many times, which reduces inspection efficiency.

The drop in testing efficiency is particularly noticeable when testing children and the elderly whose memories are vague.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an optometry device that can simultaneously view visual targets with slightly different spherical powers and improve the efficiency of spherical power tests.

Structure of the Invention (Means for Solving the Problems) The optometry device of the present invention includes a device body provided with an optometry window, and a large number of spherical lenses having different spherical powers arranged in a circular manner around the device body. and a spherical lens group displaceably attached so that each spherical lens sequentially faces the optometry window, and a spherical power disposed so as to be replaceable with respect to the optical axis formed by any spherical lens facing the optometry window. It has an auxiliary lens consisting of a pair of semicircular lenses having slightly different angles, and an auxiliary lens group consisting of an arbitrary number of combined lenses each having a configuration in which an apex prism is bonded together.

Each semicircular lens in the auxiliary lens is provided with a visual identification target.

(Function) According to the optometry device having the above-mentioned configuration, a specific spherical lens of the spherical lens group is placed in the optometry window of the device body, and the final stage of the subjective eye examination of the subject is performed. By placing a specific combination lens of the auxiliary lens group on the optical axis formed by the spherical lens, the subject can see the visual target through the action of the auxiliary lens and the combination lens, which are made up of a pair of lenses with different spherical powers. This makes it possible to view the spherical power at the same time, allowing for efficient testing of spherical power.

Furthermore, by attaching identification optotypes to the pair of semicircular lenses, the subject can communicate the visibility of the optotypes to the examiner via the identification optotypes, further improving testing efficiency. .

(Example) Examples of the present invention will be described in detail below.

FIG. 1 shows one optometric unit 3A (for the right eye) constituting the main body 2 of the optometric apparatus 1 of this embodiment, and FIG. 2 shows the external appearance of the optometric apparatus 1.

The optometry apparatus 1 includes one optometry unit 3A, the other optometry unit 3B (for the left eye) arranged in parallel with the one optometry unit h3A, and a support 4 that supports both optometry units 3A and 3B. The device includes a main body 2.

Both optometry units 3A and 3B are provided with optometry windows 5A and 5B, respectively, so as to be horizontally arranged.

Further, the support body 4 is suspended at a predetermined height by a support arm (not shown).

Inside the one eye examination unit 3A, as shown in FIG. A second spherical lens disk 6.7 and an auxiliary lens disk 8 are each rotatably arranged.

The first spherical lens disk 6 includes a required number of spherical lenses 10, for example from +15D (dayopter) to -18D.
are arranged in a circular manner, and each spherical lens 10 is mounted in such a manner that when the first spherical lens disk 6 rotates, each spherical lens 10 faces the optometry window 5A.

Further, on the second spherical lens disk 7, a required number of spherical lenses 11, for example from OD to 12y75D, are arranged in a circular arrangement and are arranged so as to face the optometry window 5A in the same manner as each of the spherical lenses 10. has been done.

A required number of combination lenses 12, which will be described in detail later, are attached to the auxiliary lens disk 8 in a circular arrangement to form an auxiliary lens group 13.

As shown in FIGS. 3 and 4, the two combination lenses 12 include an auxiliary lens 14 which is made up of semicircular lenses 14a and 14b whose spherical powers are, for example, OD and 0.25D, butt-jointed together; The other combination lenses 12 have the same structure, except that the spherical powers of the lenses 14a and 14b are 0.25D and 0.25D.
5D, 0. 0.5D and 0.75D.
Each change was made sequentially in 25D steps.

The operation of the optometry apparatus 1 having the above-described configuration will be explained below.

When examining, for example, the right eye E of a subject as shown in FIGS. 1 and 3 using this optometric apparatus 1, the first. Second
The spherical lens disk 6.7 is rotated to appropriately combine the spherical lenses 10.11, and these are brought to face the optometry window 5A.

In the final step of determining the spherical power of the right eye E, the auxiliary lens disk 8 is rotated to place a specific auxiliary lens (for example, a combination of OD and 0.25D) at the position of the optometry window 5A. Let's face it.

At this time, the subject's right eye E is separated into two by the action of the apex prism 15, or the image of the specific optotype 20 on the visual chart 21, and both semicircular lenses 14a, 14b
Therefore, one can be viewed as is while the other is weakened by 0.25D at the same time.

This allows the subject to see the lens 14a that is easier to see.

Words such as ``right side'' or ``left side'' indicating 14b can be communicated to the examiner, and the examiner can tell the examiner, for example, 0.25D, according to the examinee's words.
When the image of the optotype 20 is seen through the lens 14b of OD, the spherical power of the spherical lens 11 is weakened, and on the other hand, when the image of the optotype 20 is seen through the OD lens 14b, the spherical power of the spherical lens 11 is reduced. strengthen. By repeating such operations, the true spherical power of the eye E of the subject is determined.

FIG. 5 shows an auxiliary ring 1 with a red identification optotype 16a attached to the OD lens 14a side and a green identification optotype 16b attached to the 0.25D lens 14b side instead of the combination lens 12.
7 for both lenses 14a.

14b shows a combination lens 12A arranged around lens 14b.

By using this combination lens 12A, the subject can communicate the visual status of the optotype 20 to the examiner by color, and the response directly indicates the direction of correction of the spherical power. However, examiners can efficiently test spherical power.

In addition to the embodiments described above, the present invention can be modified in various ways within the scope of its gist.

[Effects of the Invention] According to the present invention described in detail above, it is possible to separate the same optotype into two parts using the auxiliary lens and view them as the same in slightly different states, thereby improving inspection efficiency. It is possible to provide an optometry device that can improve the performance of the eye.

Further, by adding visually discernable identification optotypes to the auxiliary lens, it is possible to easily recognize the examinee, and it is possible to provide an optometry apparatus that can further improve examination efficiency.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing the right eye unit of the embodiment device of the present invention, Fig. 2 is a front view of the embodiment device, and Fig. 3 is an explanation showing the optical system including the combination lens and spherical lens of the device. 4 is an exploded perspective view of a combined lens of the same device, and FIG. 5 is an exploded perspective view of a modified example of the combined lens. 1...Optometry device, 2...Device body, 5A, 5B...
-Optometry window, 10.11... Spherical lens, 12... Combination lens, 13... Auxiliary lens group, 14... Auxiliary lens, 14a, 14b... Lens. −. 6""1 Figure 1 Figure 2'1 ゛20 10,.15 14
E Fig. 3 +51'4° 14°

Claims (2)

[Claims] (1) A device body with an optometry window, and a large number of spherical lenses with different spherical powers arranged in a circle around the device body, and each spherical lens can be sequentially displaced so as to face the optometrist window. an auxiliary lens consisting of a pair of semicircular lenses with slightly different spherical powers and an apex prism arranged interchangeably with respect to the optical axis formed by any spherical lens facing the optometry window; and an auxiliary lens group consisting of an arbitrary number of combined lenses configured by bonding together. (2) Each semicircular lens in the auxiliary lens has:
2. The optometry device according to claim 1, further comprising an identification target that can be visually identified.