The lenses become darker when activated by UV and/or HEV light. They were specifically designed to provide patient benefits while minimizing the change to the appearance of the eye. While outdoors, the level of activation is always changing in response to the light, so in most situations the lens isn't in the darkest state. These lenses also fade back to clear quickly when you come inside.
No, ACUVUE® OASYS with Transitions™ are not intended to be used as a replacement for sunglasses. However, they can be worn with non-prescription sunglasses. While these lenses do provide UV protection to the areas they cover, other parts of the eye and surrounding areas are still exposed to UV light. Sunglasses help to protect the entire eye.
The lens activates in both indoor and UV light. Even when this lens appears clear, it is working and adapting to different lighting conditions.
While photochromic lenses react to UV light, car windshields block nearly 100% of UV light. It is important to note that ACUVUE® OASYS with Transitions™ are not a replacement for sunglasses, but they can be worn with non-prescription sunglasses.
Courtesy: Acuvue.com, Johnson & Johnson Vision
