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Visual acuity chart vision calibration method and system

A calibration method and vision chart technology, applied in the field of vision charts, can solve problems such as poor user experience and cumbersome vision test steps.

Pending Publication Date: 2020-07-28
周代辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, the present invention provides a visual acuity chart calibration method and system, which are used to solve the problems of cumbersome user visual acuity test steps and poor user experience in the prior art

Method used

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  • Visual acuity chart vision calibration method and system
  • Visual acuity chart vision calibration method and system
  • Visual acuity chart vision calibration method and system

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Embodiment Construction

[0048] In order to facilitate a better understanding of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings of related embodiments. Embodiments of the invention are shown in the drawings, but the invention is not limited to the preferred embodiments described above. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough.

[0049] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium, For use with an instruction execution system, device, or device (such as a computer-based system, a system including a processor, or other systems that can fetch instructions from an instruction execution system, device, or device and execute instructions), or in conjunction with such an ins...

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Abstract

The invention provides a visual acuity chart vision calibration method and system. The method comprises the steps that the edge width value of an E-character myopia symbol in a visual acuity chart tobe calibrated is obtained, and a corresponding test vision value is calculated according to the edge width value; international standard calculation is conducted on the test vision value to obtain aninternational standard vision value, and national standard calculation is conducted on the international standard vision value to obtain a national standard vision value; diopter calculation is conducted on the test vision value to obtain a diopter value; and eyeglass lens power calculation is conducted on the test vision value to obtain an eyeglass lens power value; according to a preset markingrule, the corresponding E-character myopia symbol is calibrated according to the eyeglass lens power value, the diopter value, the national standard vision value, the international standard vision value and the test vision value which are obtained through testing. Accordingly, calibration of the eyeglass lens power value, the diopter value, the national standard vision value, the international standard vision value and the test vision value can be conducted on the visual acuity chart to be calibrated, and when a user conducts a vision test, conversion through professionals is not needed.

Description

technical field [0001] The invention relates to the technical field of eye charts, in particular to a visual acuity calibration method and system for an eye chart. Background technique [0002] In today's life, the base of modern myopia population is very large. In order to quickly detect the myopia of human eyes, people have designed eye charts. ground use. The international standard eye chart uses the word E as the visual mark, and its stroke width and interval are both 1 point of viewing angle. The side width of the visual mark E is 5 points of viewing angle, and the width of the gap is 3 points of viewing angle. The increasing rate of the target is the number of blending sets, and the visual acuity is an arithmetic progression (0.1-1.0), which is recorded in decimals. The projection of the visual target 5 meters away on the fundus is defined as a 1-point angle of view and can be seen clearly as the standard mathematical 0-degree visual acuity. lg1=0, marked as 1.0 visu...

Claims

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Application Information

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IPC IPC(8): A61B3/032G02C7/02
CPCA61B3/0016A61B3/032G02C7/027
Inventor 周代辉
Owner 周代辉
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