Definition / Theory

Photochromic lenses are optical lenses that darken on exposure to specific types of light of sufficient intensity, most commonly ultraviolet (UV) radiation. In the absence of activating light the lenses return to their clear state.  They are principally used in eyeglasses that are dark in bright sunlight, but clear in low ambient light conditions. They darken significantly within about a minute of exposure to bright light, and take somewhat longer to clear. 

Product Performance

1)According to the intensity of the light to adjust the color depth and the comfort of the light, to bring you a high-definition comfortable vision.

2)Color change and color recovery performance is very good. The color can be completely changed into dark within  1 minute and recovered within 1.5 minutes.

3)Imported Photochromic PVA film and polarized efficiency reaches over 99%.

4)100% UV resistance. Cutting the harmful UVA, UVB, and UVC ultra violet rays which is under 400nm.

5)Curvation and optical performance is stable and pass domestic and international standards.