Flat mirrors are glasses with no diopter, no nearsightedness, no farsightedness, no astigmatism, no amblyopia, no presbyopia, no strabismus. Flat glasses, with windshield and decoration, some can also prevent UV or infrared rays from affecting the eyes. In terms of lens glass materials, there are white mirrors, color mirrors, coated mirrors, crystal mirrors, kesi mirrors, Kesai Mirror and so on.
As far as the lens glass material is concerned, there are white light mirrors, color mirrors, coated mirrors, crystal mirrors, kesi mirrors, and kesi mirrors.
The quality of the lens is divided into three levels: high, medium and low, or superior, first and second. The higher the quality, the stronger the transparency and the more the eye is protected.