TransitionsTM Generation 8
It takes about 30 seconds for your clear Transitions™ Generation 8, photochromic lenses, to darken. Once indoors again, these lenses become clear in five minutes or less.
The exact adjustment time required for these light-sensitive Transitions™ lenses can vary depending on temperature and the amount of ultraviolet (UV) exposure.
UV Exposure:
Transitions™ lenses have specialized dyes embedded or bonded to their surface. These dyes contain millions of molecules that produce a chemical reaction, change shape and structure when exposed to UV light. This change of molecules causes the lenses to automatically darken outdoors, even on cloudy days, but not indoors under artificial lighting (excluding fluorescent lighting).
Temperature:
The chemical process that darkens Transitions™ lenses also depends on factors such as temperature. This explains why Transitions™ lenses may take longer to darken when it is very cold outside. The molecules inside the lenses move and change shape slower at colder temperatures. Therefore, on hot days, Transitions™ lenses can adjust its tint and darken quickly.
Transitions™ lenses not only adjust their tint to match the light, but they also absorb 100% of UVA and UVB rays, providing total protection from the sun's most damaging rays. Like sunglasses, Transitions™ lenses can reduce the risk of developing eye conditions such as cataracts, macular degeneration and damage to the cornea.
To learn more about Transitions™ photochromic light-sensitive lenses and find the technology that's right for you, schedule an appointment with one of our Optometrists.
