JPS60135048A - Optical training apparatus for squint person - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical training device for strabismus for training eye rotation to a normal position for viewing a single image.

Conventional technology Normal sighted people are able to fixate on an object as a single image at any visual distance with both eyes; People with eutropia (esotropia) see double images. If the strabismus error is small, the strabismus will rotate his eyes to the normal position, for example, to the parallel position when the viewing distance is infinite, and train his eyeball muscles through intense training to see a single image. Has the possibility to train. With enough training, surgery can be avoided. This training is actually useful for post-surgical treatment, as strabismus errors may not be completely eliminated depending on the surgery.

In practice, the optionally interchangeable image motifs to be observed in strabismus (and thus can promote attention and arouse interest in training especially in children and also in pre-training for strabismus diagnosis) Great importance is placed on a training device that makes it possible to read out the objective eye position error and its changes during the training process.For this purpose, in known and commonly used devices in the form of a reflecting telescope, strabismus can be detected in two ways. Looking through separately adjustable eyepieces, into which each one a back-illuminated image, for example a slide positive tip, is reflected, in which case the images are different for both eyes and one The images of the two objects are motifically aligned with the image of the other.The two objectives have their angular positions aligned with each other at the strabismus angle so that the strabismus can see one image motif within the other. are aligned and adjusted until both images are subjectively viewed by the strabismus as a single image.The eyepiece then attempts to further view both images as a single image. With simultaneous effort and training, the eyeball position is adjusted relatively medially or laterally to approximate a substantially parallel normal position. However, by looking into the eyepiece, the apparatus-width axis (narrower (intensification of exotropia due to peering into a restricted space) and device accommodation (an incorrect and unsharp distance adjustment of the crystalline lens relative to the image that appears sharp at infinity due to the lens system of the device), which are difficult to measure. These disadvantageous factors also lead to errors in the diagnostic results of optical training devices for strabismus that have been conventionally applied in practice.

Problems to be Solved by the Invention (1) Accordingly, the problems of the present invention are to eliminate measurement errors due to device-comparison or device-accommodation, and to enable easy image observation and training for strabismus persons, and (1) An optical training device for strabismus that allows strabismus to observe not only still images (slide images) but also moving images (cinefilm) in order to attract children's attention and make them interested in training. The aim was to provide

Means for Solving the Problem The present invention provides an optical training device for training eye rotation to the normal position for viewing a single image, in which the device 6 is adapted to the image generator 1. , the image generator emits light having two light components separable by a light filter, and has a spectrometer 2, which spectrometer 2 divides the light of the image generator into two identical parts by means of a reflecting device 3. Decomposed into +-
to self rIv−−τ+n#＋＋＋＋J−+4ha/7+1
3J-reno 521f; door 1; 1z; has transparent filters 4, 5 and projects an image beam containing different light components from each part onto the image plane 6, in which case both images are The solution is that the direction of projection of the light beam is pivotable in order to change the distance between the two images on the image plane 6, each formed by one light component, by the spectrometer.

The image generator can be a commercially available slide projector or even a small cine projector. In order to do this, the glasses are the same filter glasses as the spectrometer filters, so strabismus only need to wear glasses that allow them to see only one of the two images formed on the image plane with each eye. Advantageously, both filters of the spectrometer are polarization filters which polarize, for example horizontally and vertically, respectively, the two unpolarized components of the image generator separated by the YC divider. In this case, the image plane should be a non-depolarizing projection plane. Image generation It is also possible to emit a multicolor image, for example, an image composed of green and red light components, depending on the device.
In this case, both filters of the spectrometer and both spectacle glasses are green and red filters.

Example The invention will now be described in detail with reference to the illustrated embodiments.

FIG. 1 VC schematically depicts an embodiment of an optical training device according to the invention, which emits light having two light components that can be separated by optical filtration (in this embodiment, unpolarized light). );
It has a spectrometer 2. The spectrometer 2 has a reflection device 3 which divides the light of the image generator 1 incident on the spectrometer 2 into two parts.
It is possible to separate and separate into two identical parts and to project the spectrometer 2 at a distance to the phase Ti. Furthermore, in the optical path of these two separated parts, the spectrometer 2 has a polarizing filter 4 for polarizing the light in the vertical direction and a polarizing filter 5 for polarizing the light in the horizontal direction, so that the spectroscope 2 also polarizes the light in the vertical direction. The image ray is polarized in the horizontal direction and the image ray is polarized in the horizontal direction.
Both projected image rays are projected onto an image surface 6 which is processed so that they are not depolarized upon reflection. A strabismus 7 who is seated in front of the image plane 6 wears glasses 8 whose glasses are polarized in the same horizontal and vertical directions. As a result, the strabismus 7 sees only one of the two images formed on the image plane 6 with each eye. In this case, this is not decisive for the principle of operation of the device and because of the preferred projection angle of both image rays for the training of medical viewers or exotropes. ``You can choose whether to wear the misaligned polarized glasses on your eyes.

In FIG. 1, the images of both image rays coincide at the image plane 6, so that a normal sighted person sees only one image whether or not he or she wears polarized glasses.

In FIG. 2, both image rays are imaged on the image plane 6 with a fixed interval between them. Therefore, a normal sighted person can see the image of the polarized left image ray seen with the right eye and the image of the left image ray seen with the left eye. It can be seen in
In order to see the image of the polarized image ray on the right side as an apparently type-image, the eyeball must be rotated inward (in Figure 5, the two image rays intersect and They strike the image plane 6 at regular intervals. Therefore, in order to see the images of both image rays as a single image, a person with normal vision must rotate his/her eyeballs strabismus outward. Training for strabismus is carried out in a similar manner. First, the strabismus subjectively single-images the image of the sound of rain with the strabismus position of both eyes. The two images are projected onto the image plane 6 at intervals such that they are viewed as one image (1).Then, the two images are brought closer to each other and moved away from each other on the image plane (2) using a spectroscope, so that the strabismus can subjectively and simply see them with both eyes. Visualize one image and practice rotating the eyeballs to a parallel normal position.

The outer mirror surfaces of both of the reflection devices 30 allow the image light beams projected from them toward the image plane 6 to rotate horizontally or vertically in opposite directions or in the same direction, so that the eyes of a strabismus are directed in and out in opposite directions. Or it can be arranged so that it can be adjusted so that it can be trained left and right or up and down in the same direction.

. The adjustable outer mirror surfaces of both reflectors 30 are arranged so that, starting from the image beam adjustment position of FIG. 1 for emmetropia, a strabismus can see both mirrors formed in accordance with FIGS. 2 and 6. It may also be connected to a display scale so that the angle of strabismus of a strabismus who subjectively views the image as a single image can be read immediately.

[Brief explanation of the drawing]

The drawings show a schematic configuration diagram of one embodiment of the optical training device of the present invention, and FIGS. 1, 2, and 3 are diagrams showing different projection positions of two image rays on the image plane. be.

Claims (1)

[Claims] 1. An optical training device for training eye rotation to a normal position for visualizing a single image, the device having an image generator (1), the image generator generating light It emits light with two light components that can be separated by a filter, and a spectrometer (
2), and the spectrometer has a reflecting device (3) for reflecting the light from the image generator.
) into two identical parts, and a filter (4, 5
) and containing different light components from the upper part are projected onto the image plane (6), and at this time, the projection directions of both image rays are determined by the spectrometer so that each light component is one light component. Optical training device for strabismus, characterized in that it is pivotable in order to change the distance between the two images formed on the image plane (6). 2. One polarizing filter (4, 5) in the optical path of the two parts in which the image generator (1) emits polarized light and the spectrometer (2) is separated by it. Optical training device according to claim 1, characterized in that the planes of polarization of the filters are twisted with respect to each other. 6. The image generator (1) emits polychromatic light and the spectrometer (
2) has a color filter in the optical path of both parts separated thereby, the color filter being transparent to different colors;
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