Photochromic Lens Suppliers in China - Intelligent Photosensitive Color Change from Trusted Factory

Photochromic lenses contain photosensitive substances (such as silver halide or organic dyes) that undergo a reversible chemical reaction when exposed to ultraviolet (UV) light. This reaction causes the lenses to darken outdoors to absorb light and revert back to a transparent state once the UV light source is removed indoors.

These lenses are available in refractive indices of 1.553, 1.597, and 1.667. They are manufactured using high-quality materials including Resin, Acrylic, MR-7, and MR-8 to suit different prescription strengths and durability requirements.

Yes, they provide built-in UV protection and anti-reflection properties. They can be coated with HMC (Hard Multi-Coated), SHMC (Super Hard Multi-Coated), Blue, or Green coatings to reduce glare and protect your eyes from harmful light waves.

Film layer color change technology applies the photochromic dyes to the outer surface of the lens, which generally results in a faster and more uniform color transition compared to substrate color change technology, where the dyes are mixed throughout the lens material itself.

While photochromic lenses are excellent for general outdoor and indoor transitions, standard photochromic lenses may not darken fully inside a car because car windshields block most UV light, which is required to trigger the color change. Special automotive-specific photochromic options are recommended for driving.