The conversion between the old and new eye charts is as follows: standard logarithmic eye chart-decimal record eye chart 5.2- 1.5, 5. 1- 1.2, 5.0- 1.04.9-0.8, 4.8-0.6, 4.4.
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Therefore, the right eye vision of 4.9 is 0.8, and 4.8 is 0.6, which belongs to mild myopia.
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The eye chart is designed according to the principle of visual angle. The so-called viewing angle is the angle formed by the light emitted by two external points passing through the nodes in the eyes (that is, the angle formed by the intersection of two external objects when they enter the eyes). In general, the human eye can distinguish the smallest distance between two points to form the smallest angle of view, that is, the tiny angle of view.
The eye chart aims to effectively detect vision in a unit of one-minute viewing angle.
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Vision chart corresponds to myopia degree
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Vision chart corresponds to myopia degree
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Vision chart corresponds to myopia degree
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0 1 The conversion between the old and new eye charts is as follows: standard logarithmic eye chart-decimal record eye chart 5.2-1.5,5.1.2,5.0-1.4.9-0.8,4.8-. 4.2——0. 15,4. 1——0. 12,4.0——0. 1。
Therefore, the right eye vision of 4.9 is 0.8, and 4.8 is 0.6, which belongs to mild myopia.
The eye chart is designed according to the principle of visual angle. The so-called viewing angle is the angle formed by the light emitted by two external points passing through the nodes in the eyes (that is, the angle formed by the intersection of two external objects when they enter the eyes). In general, the human eye can distinguish the smallest distance between two points to form the smallest angle of view, that is, the tiny angle of view.
The eye chart aims to effectively detect vision in a unit of one-minute viewing angle.