Eyesight testing apparatus

Abstract

An eyesight testing apparatus comprises a light generating assembly for generating a parallel light beam, a test assembly comprising a pictorial tablet on which an eye chart is provided, and an imaging assembly comprising a plurality of convex mirrors for amplifying and imaging a projected pattern at a distance. A first shell is provided with a first cavity, a first opening and a second opening. The light generating assembly and the imaging assembly are arranged in the first cavity, and the pictorial tablet is arranged between the light generating assembly and the imaging assembly. Parallel light generated by the light generating assembly irradiates the pictorial tablet to project the eye chart onto the imaging assembly, and the imaging assembly amplifies and images the eye chart at a distance. With the eyesight testing apparatus of the present disclosure, previous cumbersome test mode is abandoned, and whether the eyesight of a person has a problem (e.g., myopia) can be detected as long as the eyesight testing apparatus is placed on eyes; the cost is reduced, so that the apparatus can be used by more people; and the test can be conducted anytime and anywhere.

Description

technical field [0001] This application relates to medical care products, in particular to a vision detection device. Background technique [0002] There are currently three commonly used methods for the detection of vision problems in the market: [0003] The first is to use the eye chart to test, which is to use the national standard pattern of the eye chart, hang it at a certain distance, for example, 5 meters away, and then light up the eye chart, stand 5 meters away, and watch the eye chart with one eye The shape of each pattern, according to the authenticity of the shape seen, corresponds to different indicators on the eye chart, and the vision test is completed. This test method is an international general method and is mainly used in hospitals. The disadvantage is that due to the size of the eye chart and the height of the human eye, different heights of the human body must correspond to different heights of the eye chart, resulting in the hanging height of the eye ...

AI Technical Summary

Problems solved by technology

The disadvantage of this detection method is that it is very inconvenient to operate by one person. When the person to be tested puts his eyes close to the test tube and then closes to the screen of the mobile phone to watch, it is inconvenient to operate with his fingers on the screen of the mobile phone. It is more convenient to need the assistance of others.

In addition, the mobile phone, the test tube and the eyes must be all close together to test. In order to avoid multiple ways of shaking, the mobile phone screen should be placed flat on a fixed table, and then the test tube should be pressed against the mobile phone screen. The human body should bend over Bow your head for detection. There will be a certain difference between this posture and the correct standing or sitting posture of the human body. Even the ups and downs of breathing will also affect the detection accuracy. Purchasing follow-up services, such as accuracy in the process of matching glasses

[0006] However, for remote areas and economically underdeveloped areas, due to lack of resources, it is difficult to popularize early detection when vision problems occur, making subsequent vision problems difficult to prevent and protect in advance

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