What does spherical mirror 0.5 and cylindrical mirror 0.25 mean?

Spherical lenses represent the degree of myopia or hyperopia and cylindrical lenses represent the degree of astigmatism. A spherical lens of 0.5 and a cylindrical lens of 0.25 represent 50 degrees of hyperopia and 25 degrees of hyperopic astigmatism. Optometry results mainly include two indicators: spherical lens number and column lens number, spherical lens number represents the patient’s degree of myopia or hyperopia, and the main difference between the two is the sign in front of the value, if the sign is a positive sign, it represents hyperopia, and if the sign is a negative sign, it represents myopia. The cylindrical lenses represent the degree of astigmatism, and the significance of the symbol in front of the value is that the negative sign represents myopic astigmatism, and the positive sign represents hyperopic astigmatism. Spherical 0.5 cylindrical 0.25 represents 50 degrees of hyperopia and 25 degrees of hyperopic astigmatism. At present, the patient’s hyperopia and astigmatism are not very high, and generally have little effect on vision, and can be corrected temporarily without glasses.