How to read the vision checklist of a 5 year old child, what is the meaning of VD=12.00mm, what do the numbers under R S C A stand for, and what do they mean?

VD=12.00mm means that the distance between the lens and the eye is set at 12mm by the computerized optometry, which is similar to the distance from the lens to the corneal apex when you wear eyeglasses in normal times.R means right eye (Right), L means left eye (Left), S means spherical lens, which is usually called nearsightedness or farsightedness, C means cylindrical lens, which is usually called astigmatism, and A means axis of astigmatism. axis.

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