JPH03173527A - Eye shading means for ophthalmic device - Google Patents

Abstract

PURPOSE:To make unclear the filed of view of a non-subject eye and enable an inspector to observe the motion of the non-subject eye through an occluder by fitting both sides of a device body opposite to a subject eye with the occluder moving with the aforesaid body while shading the non-subject eye with a shading portion having light diffusion or refraction effect. CONSTITUTION:An occluders 4a and 4b are extended like wings symmetrically right and left from both sides of an objective lens 3, and fitted to an ophthalmic device body 1. When a subject eye E or left eye is measured or photographed, for example, a subject's face is secured to a face support seat 2 with a forehead contact member 5 and the device body 1 is moved right and left on a fixed base, thereby making the objective lens 3 oppose the subject eye E. As a result, a non-subject eye or right eye comes to oppose the occluder 4b. In this case, when the subject sees a distant point by his/her non-subject eye E' via the occluder 4b, an image becomes dim and unclear due to light diffusion effect. Consequently, the filed of view of the non-subject eye E' is shaded. On the other hand, as a distance between the non-subject eye E' and the occluder 4b is small, an inspector can observe the non-subject eye E' through the occluder 4b, though an image is somewhat unclear.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an eye-blocking means of an ophthalmological apparatus for blurring the visual field of an eye other than the eye to be examined, that is, a non-examined eye, during measurement and photographing of the eye to be examined. It is something.

[Prior Art] For example, when photographing the subject's eye with an undefeated pupil fundus camera equipped with an internal fixation lamp, if the subject does not use an occluder to shield the subject's eyes, the subject's non-patient eye Since the examiner's figure and surrounding scenery are visible, the examinee is unable to focus on the internal fixation light with his or her eye, making it difficult for the examiner to perform photographing operations.

If the field of view of the non-examined eye is blocked by an occluder, the eye to be examined can easily see the same eye, and the photographing operation, etc., can be facilitated and good photographs can be taken, so the occluder is indispensable in an ophthalmological apparatus that performs such photographing.

A commonly used occluder consists of a ladle-shaped shielding member that has a light-blocking property and is made of a metal member coated with paint.
It has a structure that allows it to be attached to the forehead rest of the face support of the device and selectively block the field of view of the subject's right or left eye.

[Problem to be solved by the invention] With the ophthalmological apparatus equipped with such a conventional occluder,
When performing imaging, testing, or measurement, the examiner cannot see the subject's eyes through the occluder, making alignment operations difficult and causing the subject to look aside. Alternatively, there is a problem in that it is impossible to observe a situation where the line of sight cannot be fixed at a predetermined position due to strabismus or the like.

The purpose of the present invention is to move the occluder in front of the eye to be examined while moving the main body of the apparatus to the eye to be examined, thereby blurring the field of view of the patient's non-examined eye. An object of the present invention is to provide a myopia means for an ophthalmological apparatus that allows observation of the movement of the eye.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the myopic means of the ophthalmological apparatus according to the present invention includes non-scanning units on both sides of the apparatus main body facing the eye to be examined, which is equipped with a measurement/optical optical system. The eye to be examined is shielded by a shielding part that has a light-diffusion or light-refraction effect, and an occluder that moves with the main body is attached. During measurement and photography of the eye to be examined, the field of view of the non-examined eye is blurred, and the examiner can pass through the shielding part and attach an occluder that moves with the main body. It is characterized in that the eye to be examined can be visually recognized.

[Function] In the myopia means of the ophthalmological apparatus having the above-described configuration, the occluder moves together with the main body of the apparatus to cover the non-examined eye, and from the examinee's side, the occluder makes the image reflected in the non-examined eye blurred, The visual field is virtually obstructed, and the examiner can observe the state of the non-examined eye through the occluder.

[Example] The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 shows a rear view of the first embodiment, and FIG. 2 shows a perspective view. The ophthalmologic apparatus main body 1 is movably mounted on a fixed base (not shown), and a face support base 2 is further fixed to the fixed base. The ophthalmological apparatus main body 1 is provided with an objective lens 3 facing the eye E to be examined, and on both sides of the objective lens 3, occluders 4a and 4b project symmetrically in a wing shape and are attached to the apparatus main body 1 to support the face. A forehead rest member 5 is provided on the upper part of the stand 2. The occluders 4a and 4b are provided at such an interval that when the eye to be examined E of one eye faces the objective lens 3, the non-examined eye E' of the other eye faces the occluder 4a or 4b. is made of a transparent material such as synthetic resin, and its entire surface is coated with a suitable matte mesh that has a predetermined light-diffusing effect.

When measuring or photographing the subject's eye E, which is, for example, the left eye, using the above-mentioned ophthalmological apparatus, first, the subject's face F is fixed to the face support stand 2 using the forehead support member 5, and the ophthalmic apparatus main body 1 is fixed. When the objective lens 3 is moved left and right on the base to face the eye E, the right non-test eye E' faces the occluder 4b. At this time, when the subject looks into the distance through the occluder 4b with the non-tested eye E°, the image becomes blurred and unclear due to the light diffusion effect, so the visual field of the non-tested eye E° is substantially It will be shielded. On the other hand, since the distance between the non-tested eye E° and the occluder 4b is small, the examiner can observe the non-tested eye E° through the occluder 4b, although it is slightly unclear.

In the above-mentioned embodiment, the entire surface of the occluders 4a and 4b is matted with mesh, but the non-examined eye E
It may be applied only to the areas necessary to shield the air. In addition, in order to obtain the same light diffusion effect, it is possible to apply a special light diffusion pattern to the occluders 4a and 4b, or to attach a film-like member that can obtain the same effect, or to attach appropriate light diffusion particles to the occluders 4a and 4b. It is also conceivable to mold the material by mixing it with a resin, or further reduce the light transmittance by coloring or the like.

FIG. 3 shows a second embodiment that utilizes the light diffusion effect, and in this case, the ophthalmological device main body 1 is wider than the first embodiment.
Diagonal groove-shaped notches 6a and 6b are provided symmetrically on both sides of the objective lens 3 provided at
, 6b, occluders 7a and 7b made of diffusion members are attached facing the subject. This notch 6a
, 6b are provided at positions where the non-tested eye E' faces the occluder 7a or 7b when the non-tested eye E° faces the objective lens 3, and the same effect can be obtained in this case as well.

Furthermore, instead of the light diffusion effect, the visual field of the non-examined eye E' may be blurred by a light refraction effect. For example, in the embodiment shown in FIG. 4, the occluder 8a or 8b has a magnifying glass-like structure in which convex lenses 10a and 10b are fitted into airfoil-shaped frames 9a and 9b. In this case, if the focal length of the convex lenses 10a and 10b is set to about 50 to 70 mm, the non-examined eye E' and the convex lenses 10a or 10
Since the distance between b is about 50 mm, the image in the field of view of the non-test eye E° becomes blurry and indistinct, unless the non-test eye E゛ is a highly hyperopic eye, and the non-test eye E It has the effect of blocking E's vision. On the other hand, the examiner said that convex lens 1
A slightly enlarged non-examined eye E' can be observed through 0a or 10b.

In this embodiment, the occluder 8 is constructed by fitting the convex lens 10 into the frame 9, but the occluder 8 may also be formed by integrally molding the frame 9 and the convex lens 10 from a transparent resin material. Furthermore, by using a Fournel lens as the convex lens 10, its thickness can be reduced. Note that this occluder 8 may be attached to a wide ophthalmic instrument body 1' as in the second embodiment.

[Effects of the Invention] As explained above, in the myopia means of the ophthalmologic apparatus according to the present invention, the occluder moves together with the ophthalmologic apparatus main body to block the non-examined eye and make its field of vision unclear, while also making it invisible to the examiner. It is possible to observe the movement of the eye to be examined, to give attention according to the condition, and to perform alignment or measurement operations easily and quickly.

[Brief explanation of the drawing]

The drawings show an embodiment of the myopia means of the ophthalmological apparatus according to the present invention, FIG. 1 is a rear view, FIG. 2 is a perspective view of the myopia means, FIG. 3 is a perspective view of the second embodiment, and FIG. 4 is a perspective view of the myopia means. is a rear view of the third embodiment. Reference numeral 1 designates the ophthalmic apparatus main body, 2 a face support, 3 an objective lens, 4, 7, 8 an occluder, 5 an abutment member, 6 a notch, 9 a frame, and 10 a convex lens. Brown 1 Figure 1i 3 Figure 2 Figure 4

Claims (1)

[Claims] 1. On both sides of the main body of the device, which is equipped with a measuring/photographing optical system and faces the eye to be examined, an occluder that shields the non-tested eye with a shielding part that has a light diffusion or light refraction effect and moves together with the main body is attached, and the eye to be examined is measured. - An eye shielding means for an ophthalmological apparatus, characterized in that the field of view of the non-examined eye is blurred during imaging, so that the examiner can visually recognize the non-examined eye through the shielding portion.