Fine-resolution eye chart

Abstract

The invention provides a fine-resolution eye chart. When the eyesight perception exceeds the applicable range of the Weber's law, the eyesight resolution is finely tested and remembered; a plurality rows of visual targets are inserted between every two adjacent visual target rows of a standard logarithmic eye chart with geometric series relationship so as to subdivide the geometric series increment between the two rows, wherein the plurality rows of visual targets have the arithmetic series relationship and other series relationships; and the reading and recording mode is to mark ':N' after the 5 grade (or decimal), wherein N is a natural number. A plurality of rows of visual targets with arithmetic series relationship are inserted into the adjacent visual target rows with arithmetic series relationship to subdivide the visual value increment between the two rows; and the reading and recording mode is to mark ':N:M' after the 5 grade (or decimal), wherein N and M are respectively a natural number.

Description

Technical field [0001] The invention relates to an eye chart, which relates to the standard logarithmic eye chart marking and reading method based on Weber's law in the process of making the eye chart. Background technique [0002] At present, the production of the known standard logarithmic vision chart is based on Weber's law to formulate the visual marking and reading method of the standard logarithmic vision chart, using five-point or decimal reading methods; however, when the visual acuity resolution is critical In this situation, the law of vision perception is beyond the scope of application of Weber's law. At present, the difference in visual acuity values ​​between the lines of visual marks on the eye chart is large, and finer visual acuity resolution cannot be performed. Contents of the invention [0003] A fine-resolution eye chart provides a new way to fine-tune the test to note visual resolution when visual perception falls outside the range where Weber's Law ...

AI Technical Summary

Problems solved by technology

[0002] At present, the production of the known standard logarithmic vision chart is based on Weber's law to formulate the visual marking and reading method of the standard logarithmic vision chart, using five-point or decimal reading methods; however, when the visual acuity resolution is critical In this situation, the law of vision perception is beyond the scope of application of Weber's law. At present, the difference in visual acuity values ​​between the lines of visual marks on the eye chart is large, and finer visual acuity resolution cannot be performed.

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