A single vision chart and visual inspection method

An eye chart and vision technology, applied in medical science, diagnosis, eye testing equipment, etc., can solve problems such as untrue vision test results and inability to overcome fake vision, so as to improve the accuracy of the test, overcome fake high vision, prevent The effect of camouflage

Active Publication Date: 2021-08-31
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the above-mentioned deficiencies in the existing visual inspection process, such as untrue visual inspection results and inability to overcome the fake vision, and provides a single vision chart and a visual inspection method. and direction, conduct multiple inspections on the inspected person to obtain the true vision of the inspected person, which can overcome the fake high vision

Method used

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  • A single vision chart and visual inspection method
  • A single vision chart and visual inspection method
  • A single vision chart and visual inspection method

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Embodiment 1

[0034] Embodiment 1: see figure 1 , a kind of single-vision chart, in this single-vision chart, comprises 5 optotypes of the same size, and 5 optotypes are arranged in a square shape, wherein, 4 optotypes are located at the four corners of the square, and 1 optotype Located at the center of the square, the blank distance between any two adjacent optotypes is more than half of the width of the optotype, and any two adjacent optotypes in the vertical direction have different directions, and any adjacent ones in the horizontal direction The 2 visual targets are in different directions.

Embodiment 2

[0035] Example 2: see figure 2 , a kind of single vision chart, in this single vision chart, includes 5 optotypes of the same size, the 5 optotypes are arranged in 2 rows, the first row includes 2 optotypes, and the second row includes 3 optotypes Optotypes, the first row of optotypes and the second row of optotypes are arranged alternately, the blank distance between any two adjacent optotypes is more than half of the width of the optotypes, any adjacent two in the horizontal direction The directions of the visual targets are different.

Embodiment 3

[0036] Embodiment 3: see image 3 , a single vision chart, in which 9 visual targets of the same size are included, and every 3 visual targets of the 9 visual targets form a column and a row, forming a nine-square grid, between any two adjacent visual targets The blank distance between them is more than half of the width of the visual target, and any two adjacent visual targets in the vertical direction have different directions, and any two adjacent visual targets in the horizontal direction have different directions.

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Abstract

The invention relates to a single vision chart and a visual inspection method. The single vision chart is a plan view composed of at least 5 visual targets of the same size. In the visual chart, there are 4 directions of visual targets, and any adjacent 2 The blank distance between two optotypes is more than half of the width of a single optotype, and any two adjacent optotypes in the vertical direction have different directions, and any two adjacent optotypes in the horizontal direction have different directions. In the present invention, by changing the structure of the eye chart, multiple inspections are carried out on the inspected person to obtain the authenticity of the inspected person's main vision. The reciteability is reduced, and the examinee can only rely on the real vision to identify the best vision target, and cannot fake vision. It can effectively overcome the examinee's fake high vision and discover the fake vision, and improve the accuracy of the test.

Description

technical field [0001] The invention belongs to the technical field of visual acuity testing, and in particular relates to a single vision chart and a visual acuity testing method. 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, but in the process of vision testing, there are mainly the following problems: [0003] The test results of visual acuity depend on subjective cooperation and main statement, and there are some untrue situations. The routine visual acuity test method is: the visual acuity chart lists various visual acuity targets, the standard test distance is 5 meters, and the smallest visual acuity that can correctly identify more than half is the visual acuity. Since the test process is highly dependent on subjective cooperation and the main statement, if the main statement is not true, the test results cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/032
CPCA61B3/032
Inventor 汪岚苑一祥苑志岷
Owner QINGDAO UNIV
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