ZEISS Self-tinting Lenses

Self-Tinting Lenses by ZEISS

Comfortable vision in any light condition

The characteristic feature of photochromic lenses is that they become steadily darker with increasing exposure to UV radiation and clear again when the radiation decreases. Photochromic lenses adapt to changing light conditions and hence provide optimum protection against glare in almost any situation. Due to the time required for the photochromic substances to react, protection cannot be guaranteed against sudden glare.


What influences darkening

What influences darkening

Self-tinting lenses can be made of glass or plastic. Their darkening and clearing process is dependent on ambient temperature and on the intensity of the UV radiation to which they are exposed. The higher the intensity of the radiation and the lower the temperature, the darker the lens and the faster the darkening process.


This means that maximum darkening is achieved in winter conditions in mountainous regions, and the lenses become slightly less dark in summer heat. Maximum darkening is not possible in motor vehicles, as the windscreen absorbs UV radiation.



High-Tech Product

ZEISS scientists and engineers have responded to consumer expectations of self-tinting lenses by refining this technology to create PhotoFusion. The lenses represent a genuine improvement in comfort for the wearer.

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While ZEISS recommends PhotoFusion as a self-tinting solution for lenses. Transitions lenses are also available.