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Fast dark. Fast clear: Self-tinting lenses by ZEISS

Whether in the sun or indoors: 24 hours of excellent vision with PhotoFusion® self-tinting lenses offered by ZEISS

Are you looking for a new, favourite pair of glasses? Ones that will give you excellent vision in any light day or night? With self-tinting lenses that will give you 100% protection from the sun and harmful solar UV rays and will do away with having to change back to your conventional glasses? As of now, ZEISS is also offering the latest generation of self-tinting lenses in the well-known ZEISS quality. And the best thing is that PhotoFusion® high- and mid-index self-tinting lenses turn up to 2 times faster*  from dark to clear than previous photochromic lenses offered by ZEISS.

*Average performance for 1.67, 1.6 and polycarbonate lenses. Performance will vary according to material, temperature and light conditions.

Also known as photochromic lenses, self-tinting lenses have been around since the 1960's. The small, yet significant discovery made by chemist Stanley Donald Stookey and his colleague, William Armistead, made it possible to have spectacle lenses that react to UV rays remarkably well. Ever since then, a lot has happened in view of the quality and performance of self-tinting lenses and they are extremely popular amongst many people who are dependent on their glasses and constantly going indoors and outdoors.

What are the differences in quality amongst self-tinting lenses?

With self-tinting lenses, the annoying need to change glasses is a thing of the past. Latest market research by ZEISS show that spectacle wearers however have very clear criteria regarding the quality and performance of self-tinting lenses:

  • To be comfortable to use, self-tinting lenses must adjust very quickly to the changing light conditions.
  • To attain optimal vision, self-tinting lenses must become really dark in sunlight and completely clear indoors.
  • Self-tinting lenses must be effective and also offer 100% UV protection.
  • To look good, self-tinting lenses should be available in attractive, harmonious tints.
  • Self-tinting lenses should have a long life performance and high performance.

 

Glasses for all light conditions from ZEISS

These requirements were taken into account in the development of PhotoFusion® by ZEISS. In just 15 to 30 seconds, PhotoFusion® high- and mid-index lenses will darken in bright light or in the sun*. Indoors, they clear again in about 5 to 10 minutes*. That is the reason why PhotoFusion® is a leader among self-tinting lenses. And of course, it offers 100% protection against solar UV rays as a standard feature.

*Average performance for 1.67, 1.6 and polycarbonate lenses. Performance will vary according to material, temperature and light conditions.

A further milestone in 160 years of ZEISS expertise; as well as anti-reflective coating and customised progressive lenses, the original self-tinting plastic lenses were first launched by the Carl Zeiss Vision brand American Optical in 1983.

How do phototropic/self-tinting lenses work?

A chemical reaction involving certain molecules is used as the basis for self-tinting lenses. The secret behind PhotoFusion® high- and mid-index self-tinting lenses is photo-active molecules which react quickly to changing light. When there are changes in the exposure to light, the molecules in the lens change, darkening or clearing the lens.  By combining these molecules with ZEISS lenses, it has been possible to design a new generation of powerful self-tinting lenses.

The terms "phototropic" ("phototrop" literally translated = "towards light") and "photochromic" (from Greek: phos = light and chroma = colour) lenses are often used for self-tinting lenses. Both terms refer to the same type of eyeglass lenses.

Good for you! PhotoFusion® is available across a wide range of designs, brands and materials.. This means that PhotoFusion® spectacles wearers do not have to miss out on any offers or quality aspects for relaxed vision: more visual comfort, better quality of life.

PhotoFusion® availabilty:

  • Super anti-reflective coating, LotuTec and Pure Coat coatings.
  • For single vision lenses, progressive lenses and computer lenses.
  • For all individual spectacle lens features from ZEISS such Framefit and also for curved lenses such as Clarlet Loop.

 

Questions and answers on Self-tinting Lenses with PhotoFusion®

Pfeil

Do PhotoFusion® lenses work in a car?

Much of the UV radiation that activates self-tinting lenses is absorbed by car windshields. Fortunately, PhotoFusion® lenses retain more of their self-tinting performance inside automobiles than the existing generation by ZEISS. Nevertheless, some wearers may prefer a dedicated pair of sunglasses for extended periods of driving.

Pfeil

Are PhotoFusion® lenses clear indoors?

Yes, PhotoFusion® lenses will appear virtually clear indoors to wearers.

Pfeil

Will PhotoFusion® lenses replace sunglasses?

For general-purpose use - either indoors, outdoors, 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 windscreens that block most ultraviolet radiation, or in environments with intense reflective glare from surfaces such as water and snow, a dedicated pair of prescription sunglasses with a fixed tint will offer the best form of glare protection and visual comfort.

Pfeil

How fast are PhotoFusion® high- and mid-index self-tinting lenses (darken and fading back)?

PhotoFusion® high- and mid-index self-tinting  lenses provide very good speed, darkening up to 20% faster* than the existing generation by ZEISS - and fade back to clear up to twice as fast*.

*Average performance for 1.67, 1.6 and polycarbonate lenses. Performance will vary according to material, temperature and light conditions.

Pfeil

How do PhotoFusion® lenses react in the shadow?

Depending on the intensity of UV rays in the shadow, self-tinting lenses will be not as dark as in the full sun, but will always provide 100% solar UV protection.

Pfeil

Are PhotoFusion® lenses suitable for night driving?

Of course! They are as good as other clear lenses for night driving.

Pfeil

Do PhotoFusion® lenses have UV protection?

Yes, the base material already contains a 100% solar UV protection, whether the lens is clear or darkened. The wearer is always protected against solar UV rays.

Pfeil

Are PhotoFusion® lenses suitable for all-day wear, inside or outside?

Yes, PhotoFusion® lenses are virtually clear in their faded state, making them perfectly suitable for indoor and night-time use. Furthermore, when exposed to sunlight, PhotoFusion® lenses darken as needed to maintain sufficient glare control, darkening to near-sunglass tint in bright sunlight. In extremely sunny situations an extra pair of sunglasses may be useful.

Pfeil

What are the benefits of PhotoFusion® lenses compared to clear lenses?

Unlike clear lenses, PhotoFusion® self-tinting lenses darken as ambient light levels increase. They are virtually clear indoors and darken to near sunglass-density under bright sunlight, providing glare protection and increased visual comfort.

Pfeil

Will PhotoFusion lenses work as well as my previous pair of self-tinting – or “photochromic” – eyeglasses?

PhotoFusion® high- and mid-index lenses rely on the latest advancements in self-tinting technology, offering very good performance. They darken up to 20% faster* and fade back up to 2 times faster* than previous photochromic lenses offered by ZEISS. Furthermore, PhotoFusion® lenses will offer strong and long lasting performance.
Results of a wearer test showed that 97% of wearers say PhotoFusion® is better than or equal to their old “photochromic” lenses.

*Average performance for 1.67, 1.6 and polycarbonate lenses. Performance will vary according to material, temperature and light conditions.