Zeiss Photofusion

10 questions and answers on self-tinting lenses with PhotoFusion

1. Do ZEISS PhotoFusion lenses work in the car?
A large part of the UV rays required to activate the self-tinting lenses is intercepted by the windshield. Fortunately, the PhotoFusion lenses retain more of their self-tinting performance in the car than previous generations. Nevertheless, when the sun’s in their eyes during long journeys, wearers should opt for standard sunglasses.

2. Do ZEISS PhotoFusion lenses become totally clear indoors?
Yes, PhotoFusion lenses appear almost totally clear to the wearer when they’re back indoors.

3. Can ZEISS PhotoFusion lenses replace sunglasses?
For general use – either indoors, outdoors, or during the day or night – PhotoFusion lenses offer excellent overall visual performance and glare protection. Nevertheless, under intense sunlight in environments with high temperatures, inside cars with windshields that block most UV rays, or in environments with intense reflective glare from surfaces such as water and snow, a pair of prescription sunglasses with a fixed tint will offer the best form of glare protection and visual comfort.

4. How fast are PhotoFusion lenses (at darkening and clearing up)?
Self-tinting PhotoFusion lenses with high and medium refractive indices react at a very high speed: they darken up to 20 percent faster* than the current generation of self-tinting lenses by ZEISS – and clear up again up to twice as fast*.


5. How do ZEISS PhotoFusion lenses react in the shade?
Depending on the intensity of UV rays in the shade, self-tinting lenses will not be as dark as they are in direct sunlight and therefore only become slightly tinted. However, they still offer full UV protection.

6. Are ZEISS PhotoFusion lenses suitable for driving at night?
Yes, they are as suitable for driving at night as any other clear lens. They are also available as ZEISS DriveSafe versions.

7. Do ZEISS PhotoFusion lenses provide reliable UV protection?
ZEISS PhotoFusion lenses protect wearers’ eyes against UV rays at all times. A number of base materials contain full UV protection, regardless of whether the lens is in its clear or darkened state.

8. Are ZEISS PhotoFusion lenses suitable for wearing all day long, indoors as well as outdoors?
Yes, ZEISS PhotoFusion lenses are virtually clear in their faded state, making them perfectly suitable for use indoors and at night. Furthermore, when exposed to sunlight, ZEISS PhotoFusion lenses darken as needed to maintain sufficient glare control, achieving a near-sunglass tint in bright sunlight. You can choose ZEISS lenses with PhotoFusion to meet your particular needs

In extremely sunny surroundings, a standard pair of sunglasses can come in handy.

9. What benefits do ZEISS PhotoFusion lenses offer compared to clear lenses?
Unlike clear lenses, self-tinting PhotoFusion lenses darken when the surrounding light intensifies. Indoors, they are almost clear and, when exposed to bright sunlight, darken to a degree that is comparable to standard sunglasses. This means that they protect against glare and offer enhanced visual comfort.

10. Will ZEISS PhotoFusion lenses work as well as my previous pair of self-tinting, or photochromic, glasses?
PhotoFusion lenses from ZEISS are produced with the latest self-tinting technology and therefore offer a high level of performance. They darken up to 20 percent faster and clear up again up to twice as quickly* as previous photochromic lenses from ZEISS. In addition, PhotoFusion lenses provide high performance over the long term.