CN1138973A - Stereo vision test card - Google Patents
Stereo vision test card Download PDFInfo
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- CN1138973A CN1138973A CN 95108014 CN95108014A CN1138973A CN 1138973 A CN1138973 A CN 1138973A CN 95108014 CN95108014 CN 95108014 CN 95108014 A CN95108014 A CN 95108014A CN 1138973 A CN1138973 A CN 1138973A
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- stereo vision
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Abstract
As high visual function, the stereo vision of human eye is an important item in eye test and has great effect on the diagnosis and cure evaluation of eye diseases such as amblyopia, strabismus, ametropia, etc. The said stereo vision test card with cylindrical lens is designed by applying the diffraction principle of light and the visual physiological function of eye. It can test the vision sharpness of eye, detect its stereo vision range quantitatively and detect its physical and pathological defect in stereo vision. As a vision test device, it is essential to the study of brain's image merging function and ophthalmological diagnosis and study.
Description
The technology of the present invention relates to a kind of need not by the attached device that helps of any optics, observes the stereo vision test card that gets final product direct human body stereoscopic vision function with bore hole.Belong to medical optical instrument.
The three dimensions stereoscopic vision of human body is a kind of high-level vision function, is the indispensable big event of ophthalmologic examination, and the Clinics and Practices evaluation of oculopathy such as amblyopia, stravismus, ametropia, anisometropia, asthenopia is had epochmaking effect.Along with science and technology development, require the sound working range of stereoscopic vision function to enlarge day by day, all need good stereoscopic vision as pilot, special technical soldier, driver, mechanically actuated, precision instrument manufacturing, the manufacturing of extra accuracy large scale integrated circuit, microsurgery, athlete, work high above the ground etc., therefore, strictly measure stereoscopic vision and seem more urgent and important.At present, both at home and abroad clinical ophthalmology is all used Howard-DolmanShi depth gauge, synoptophore, Random-dot Stereograms RDS etc. and is carried out stereopsis test.The operation of Howard-DolmanShi depth gauge is complicated, time-consuming, carries inconvenience, not too uses at present; Synoptophore costs an arm and a leg, and operation is complicated, time-consuming, carries inconvenience, and utilization rate is lower; Random-dot Stereograms RDS is that present clinical ophthalmology uses more a kind of method, and still, the patient need wear red green coloured spectacles when carrying out stereopsis test, operates also more time-consumingly, and color anomalopia chromatopsia patient uses limited.
The task of the technology of the present invention provides a kind of cylindrical lens stereo vision test card of using diffraction of light principle and eye vision physiological functional design.Stereo vision test card is to adopt slit shape grid as shadow mask, has the left and right sides random point image of parallax value in the same slit-shaped of back Alternation Display of slit shape grid.When checking stereoscopic vision, make left and right random point image behind the slit shape grid enter patient's images of left and right eyes respectively, the left and right sides random point image with parallax value melts to resemble through the human brain cortex and promptly produces the three-dimensional special image of three dimensions; Monocular vision just can not melt to resemble and produces the three-dimensional special image of three dimensions at cerebral cortex, and the patient can't differentiate the three-dimensional special image of generation.Stereo vision test card, can check human body stereoscopic vision acutance, quantitative assay stereoscopic vision scope, have the physiological in the stereoscopic vision of detecting and the function of pathologic defective, performance accurately and reliably, and carrying easy to operately, is that the research brain melts and resembles function and the ophthalmology is clinical, scientific research, the necessary visual function appliance of teaching.
The technology of the present invention is described specifically with the following Examples.
Fig. 1 is a stereo vision test card operation principle sketch map.
According to shown in Figure 1, cylindrical lens stereo vision test card (1) is to adopt slit shape grid as shadow mask (2), has the left and right sides random point image (3) of parallax value in the same slit-shaped of back Alternation Display of slit shape grid (2).When checking stereoscopic vision, make the left and right random point image behind the slit shape grid enter patient's a left side (4), right eye (5) respectively, image (3) melts through the human brain cortex and resembles (6) and promptly produce the three-dimensional special image of three dimensions; Monocular vision does not exist cerebral cortex to melt the three-dimensional special image of picture generation three dimensions, and the patient just can't differentiate the three-dimensional special image of generation.Stereo vision test card (1) has the physiological in the stereoscopic vision of detecting and the function of pathologic defective, and performance and is carried easy to operate accurately and reliably.
Claims (2)
1. cylindrical lens stereo vision test card of using diffraction of light principle and eye vision physiological functional design, it is characterized in that: cylindrical lens stereo vision test card (1) is to adopt slit shape grid as shadow mask (2), has the left and right sides random point image (3) of parallax value in the same slit-shaped of back Alternation Display of slit shape grid.When checking stereoscopic vision, make the left and right random point image behind the slit shape grid enter patient's a left side (4), right eye (5) respectively, image (3) melts picture (6) through the human brain cortex and promptly produces the three-dimensional special image of three dimensions.
2. according to claim 1, its feature also is: when checking patient's stereoscopic vision with cylindrical lens stereo vision test card (1), the image display process patient need not by optical display, observes with bore hole directly to show stereo-picture, checks stereoscopic vision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95108014 CN1138973A (en) | 1995-06-28 | 1995-06-28 | Stereo vision test card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95108014 CN1138973A (en) | 1995-06-28 | 1995-06-28 | Stereo vision test card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1138973A true CN1138973A (en) | 1997-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95108014 Pending CN1138973A (en) | 1995-06-28 | 1995-06-28 | Stereo vision test card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1138973A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114445833A (en) * | 2022-01-28 | 2022-05-06 | 北京百度网讯科技有限公司 | Text recognition method and device, electronic equipment and storage medium |
-
1995
- 1995-06-28 CN CN 95108014 patent/CN1138973A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114445833A (en) * | 2022-01-28 | 2022-05-06 | 北京百度网讯科技有限公司 | Text recognition method and device, electronic equipment and storage medium |
| CN114445833B (en) * | 2022-01-28 | 2024-05-14 | 北京百度网讯科技有限公司 | Text recognition method, device, electronic equipment and storage medium |
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