Vision inspection device

An inspection device and vision technology, applied in medical science, eye testing equipment, diagnosis, etc., can solve problems such as difficulty in judging the authenticity of vision inspection results and large errors in low vision inspection

Active Publication Date: 2019-09-17
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a vision testing device for the above-mentioned deficiencies in the existing vision testing process, such as the difficulty in judging the authenticity of the vision test results and the large error of the low vision test.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0048] Embodiment 1: see figure 1 , a heterogeneous visual acuity chart, in the heterogeneous visual acuity chart, it includes 2 kinds of visual targets with different sizes and a perspective view that affects the visual depth of different sizes of visual targets, and the first type of visual targets includes 5 small-sized visual targets Optotypes, the second type of optotypes include 5 large-sized optotypes, and the first type of optotypes and the second type of optotypes are placed in different positions. The perspective view includes a first line A, a second line B and a third line C, several first lines A are concentrated to one point along the depth direction, and several second lines B parallel to each other are parallel to the first line in the horizontal direction The grid pattern formed by the intersection of A forms a horizontal plane, and several parallel third lines C intersect with the first line A in the vertical direction to form a number of grid figures arrang...

Embodiment 2

[0049] Example 2: see figure 2, a heterogeneous vision chart, in the heterogeneous vision chart, it includes 2 kinds of optotypes with different sizes, a perspective view that affects the visual depth of the different sizes of the optotypes, and 2 E-word optotype graphics composed of lines , the first type of optotype includes 5 small-sized optotypes, the second type of optotype includes 5 large-sized optotypes, and the first type of optotype and the second type of optotype are placed in different positions. The structure in the perspective view is the same as that in Embodiment 1. Among the two E-word optotype graphics, the size of one E-word optotype graphic is not greater than 0.5 times that of the first type of optotype, and the size of the other E-word optotype graphic is not less than 1.5 times that of the second type of optotype. Specifically, the upper right area of ​​the heterogeneous visual acuity chart is the first type of optotype, among the five optotypes, the f...

Embodiment 3

[0050] Embodiment 3: see image 3 , a heterogeneous visual acuity chart, in the heterogeneous visual acuity chart, including two kinds of optotypes of different sizes, a perspective view that affects the visual depth of different sizes of optotypes, and four E-word optotype graphics composed of lines , the first type of optotype includes 5 small-sized optotypes, the second type of optotype includes 5 large-sized optotypes, the 2 types of optotypes are divided into 2 groups, and the first group of optotypes includes 4 first-type optotypes The second group of optotypes includes one second type of optotype and four first type of optotypes, and the optotypes of the first group and the second group are placed in different places. s position. Among the 4 E-word optotype graphics, there are 2 small E-word optotype graphics of the same size and 2 large E-word optotype graphics of the same size, and the size of the small E-word optotype graphics is not larger than that of the first ty...

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Abstract

The invention discloses a vision inspection device which comprises a distance measuring device, a visual chart installing and adjusting device and a visual chart supporting device. The visual chart installing and adjusting device is fixed to the visual chart supporting device for converting and display different visual charts, the distance measuring device is used for measuring the distance between a person to be inspected and the visual chart to be inspected, and the visual chart or the imaging of the visual chart in a mirror is the visual chart to be inspected. During vision inspection, alternative conversion inspection of different visual charts is adopted, when a heterogenous visual chart and a single visual chart are adopted for inspection, the inspection distance between the person to be inspected and the visual chart to be inspected is converted, and therefore the best vision of the person to be inspected is obtained. Whether or not the vision inspected by standard logarithmic visual acuity chart is the real vision judged according to vision differences between different visual charts and different vision inspection results, and the disguised vision can be effectively found.

Description

technical field [0001] The invention belongs to the technical field of vision detection, and in particular relates to a device for vision detection. Background technique [0002] Vision is one of the commonly used indicators of human body function status. In my country, the "GB 11533 Standard Logarithmic Vision Chart" is usually used to test vision. However, in the process of vision testing, the main problems are: [0003] (1) The test results of visual acuity depend on subjective cooperation and narration, which may be untrue. Tested by a conventional eye chart, the standard test distance is 5 meters, and more than half of the smallest visual marks that can be correctly identified are visual acuity. Since the test process is highly dependent on subjective cooperation and the main statement, and the direction and order of the various vision targets in the eye chart are fixed, when the main statement is not true, the test results cannot reflect the real vision. For example,...

Claims

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Application Information

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IPC IPC(8): A61B3/032
CPCA61B3/032
Inventor 汪岚苑一祥苑志岷
Owner QINGDAO UNIV
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