Method, device and terminal for testing vision
A technology for detecting vision and equipment, applied in the field of vision detection, to achieve the effect of improving the level of intelligence, enhancing functions, and simplifying the process of detecting vision
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[0017] The present invention will be exemplarily described below based on a standard logarithmic vision chart using an "E"-shaped visual mark and related detection methods. It should be understood that the present invention is not limited to the specific shapes and detection methods described below, and the present invention is also applicable to other optotype shapes such as "C" and "J" shapes and related detection methods.
[0018] The eye chart used to test eyesight is designed according to the principle of visual angle, such as figure 1 As shown, the so-called angle of view is the angle formed by the light emitted by two external points and the node N in the eye.
[0019] The standard logarithmic eye chart stipulates that the angle of view formed by the minimum distance between two points can be distinguished by the human eye under standard vision, and the corresponding visual acuity is 5.0 (equivalent to 1.0 in the decimal recording method).
[0020] The conventional sta...
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