System and method for reading visual acuity examination

Abstract

The invention discloses a system and a method for reading visual acuity examination. The system comprises a reading visual acuity examination APP module, which is used for acquiring a parameter setting instruction, setting a reading parameter of a reading visual acuity chart, controlling display of a reading visual acuity chart, and analyzing and recording a reading time of the subject. Reading accuracy and reading critical visual indicators, analyzing the relevant data of the records and giving the analysis graphics to diagnose the reading vision of the subject; the display module is used todisplay the reading visual acuity chart. The system and the method can not only clearly display all the visual targets of the decimal point recording 0.06 to 2.0 in the close-range inspection of 25 to40 cm, but also record the reading time, the reading accuracy and the reading critical target size through the speech recognition engine. A graphical analysis of reading vision is given to accuratelyand quickly test the subject's text recognition ability and reading speed.

Description

technical field [0001] The invention relates to the technical field of ophthalmic medical devices, in particular to a reading vision inspection system and method. Background technique [0002] At present, most of the visual function tests of subjects in clinical and research use "E" or "C" visual charts. This type of eye chart cannot evaluate the reading ability of the test subject, and a special reading eye chart is needed to evaluate it. The reading eye chart can not only meet the design principles of the traditional "E" and "C" eye charts, but also can predict the reading ability of the testee by measuring the maximum reading speed, Chinese character reading ability and other data. [0003] Spanish reading charts have been used for many years, such as MN-Read and Radner Reading reading charts. The development of the domestic Chinese logarithmic reading eye chart has just started. The reading vision test involves multiple functional indicators, high precision requiremen...

AI Technical Summary

Problems solved by technology

The reading vision test involves multiple functional indicators, high precision requirements, and strong complexity, including the following two aspects: 1. At present, most reading vision charts at home and abroad are printed on coated paper, heavy coated paper, etc. It is very difficult to clearly display all the visual marks with a visual acuity of 0.06 to 2.0 in a close-up inspection of 25 to 40 cm. Ordinary paper and light film cannot achieve such high-precision printing and display. The size of the label should be about 0.29mm square to clearly display a complete Chinese character

However, in a published Chinese reading vision manual in China, the smallest optotype only reaches the size of the decimal record 0.8, and it is difficult for paper vision charts on the market to meet this requirement.

In addition, the paper eye chart has strict requirements on the environment and must be tested under good lighting conditions. It is difficult to avoid the impact of reflections, and it is difficult to strictly control the distance and angle between the eyes and the paper.

2. The data that needs to be collected during the test, such as reading time, reading accuracy and the size of the reading critical visual target, are all done manually, which is easy to affect the stability of the test results and cause large errors

The reading logarithmic visual acuity test form in this method is still made of paper, which cannot meet the clinical requirements of printing the smallest visual mark due to the limitation of paper printing technology. The test data is still completed manually and cannot be automatically recorded and analyzed.

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