These glasses adjust themselves to changing light conditions and thus provide an optimal glare protection for almost every situation. The lenses get lighter inside and get darker outside in a very short time, in order to optimally protect your eyes from the prevailing light conditions.
The darkening and lightening of these lenses is dependent on the temperature and the intensity of UV radiation. UV rays trigger a chemical reaction in the photochromic lenses. Under exposure of UV light, the arrangement of the molecules of certain chemicals, such as naphthopyran for example, changes. During the photochromic process, millions of photochromic molecules are deposited at a depth of approx. 0.15mm in the front surface of the lens, the so-called photo sensitive coating. As the molecules are only found on the surface of the lens, the entire lens darkens uniformly, regardless of its dioptric power. They are just as clear as conventional lenses, both inside and at night.

The lenses absorb 100% of the sun’s harmful UVA and UVB radiation.