The medical record of glasses has the parameters of glasses. After optometry in the hospital, the nurse will paste the examination results on the medical record book. The letters on the optometry sheet represent:

1, s: indicates the degree of spherical lens, that is, the degree of myopia or hyperopia. The "+"in front of the number stands for hyperopia and the "-"stands for myopia.

2.c: indicates the degree of astigmatism.

3. Answer: It means the axial direction of astigmatism, and only when there is astigmatism can there be an axial direction.

4, R, L:R stands for right eye and L stands for left eye.