Essential details
MOQ:1000
Lead time:30天
Shipping:Air freight, Ocean freight
Product Introduction
Bifocal lens can be used to correct both far and near vision, mainly for presbyopia. The general distribution of bifocal lens is: the upper part of the lens is to see the distance, the lower part of the lens is used to watch the use of the near point, as for the size of the near norm, the nature of the near work to set.
Color changing lens is made of optical glass containing silver halide microcrystal. According to the principle of reversible reaction of light color tautometry, it can quickly darken under sunlight and ultraviolet radiation, completely absorb ultraviolet light, and show neutral absorption to visible light. Back to the dark, can quickly restore colorless transparent.
