Single Vision Photochromic Darker lenses are lenses made of discolored glass.Change the color of the glass by irradiating it with the appropriate wavelength light, and restore its original color when the light source is removed.

Single Vision Photochromic Darker lens are made of glass with a light-coloured material added to it.The material has two different molecular or electronic structure states, and there are two different absorption coefficients in the visible region. Under the action of light, the material can change from one structure to another, causing a reversible change in color.

Silver Halide Single Vision Photochromic Darker lens are a common material for making discolored glasses because they are not easy to fatigue and do not fail after more than 300,000 shading changes.Single Vision Photochromic Darker lens can also be used for information storage and display, image conversion, light intensity control and adjustment.

Single Vision Photochromic Darker lens are exposed to ultraviolet and short-wave visible light in sunlight, resulting in darker colors and lower light transmittance.In indoor or dark areas, the light transmittance of the lens is increased, and the discoloration is restored.Single Vision Photochromic Darker lens'photochromism is automatic and reversible, and it can adjust the eyes to changes in ambient light, reduce visual fatigue, and protect the eyes by changing the color of the lens to save light transmittance.Single Vision Photochromic Darker lens can be divided into two types before discoloring: no base color and light color with base color.The main colors after discoloration are gray and brown.