Far and near visual chart based on millimeter recording method and intelligent detection system

Abstract

The invention provides a far and near visual chart based on a millimeter recording method and an intelligent detection system; sighting marks are notch sighting marks; and visual values corresponding to the sighting marks in the visual chart are recorded through the millimeter recording method, namely, the visual values corresponding to the sighting marks are equal to the millimeter value of the width of the notch of the sighting marks. The intelligent detection system is provided with a registration and filing module, a data storage module, an intelligent calibration module and a vision detection module. According to the invention, the sighting mark is designed by adopting the international general unit of 'millimeter'; the millimeter value of the notch width of the sighting mark is directly taken as the vision value for recording, so that the unification of vision records among countries is facilitated; the direct comparability of the vision value is improved; the academic exchange is facilitated; the vision statistical analysis can be performed more quickly; and quantitative analysis of vision is included. Moreover, the width of a sighting mark notch is distinguished; and the vision is evaluated according to the size of millimeter, so that the method is more intuitive and clear, and is easier to understand and accept by the general public.

Description

technical field [0001] The invention relates to a visual acuity chart and a visual acuity detection system, in particular to a far and near visual acuity chart and an intelligent detection system based on a millimeter recording method, belonging to the technical field of visual acuity detection. Background technique [0002] All of today's eye charts use "angle of view" as the unit of vision, and "1 point of angle of view" as the standard of vision for normal people. This standard comes from the opinion of the British astronomer Hook in 1738. He believed that the angle of view that can distinguish two separate stars should be greater than 1 minute of arc, and less than 1 minute of arc means that they cannot be distinguished. The theory of ophthalmology introduced this point of view, pointing out that in order for the human eye to recognize the two ends of an object, there must be two optic cone cells stimulated (excited) on the retina, and at least one unidentified cone betw...

AI Technical Summary

Problems solved by technology

Obviously, these recording methods will be difficult for people who are not engaged in the design of eye charts. The doctor also seems to understand

It is precisely because of the inconsistency of recording methods that the direct comparability of visual acuity values ​​between countries with different recording methods has been lost, which has a negative impact on academic exchanges between them.

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