Photochromic lenses are a kind of lenses which are going to be darkened due to their exposure to light. At the moment when they come into contact with light, the lenses turn into dark sunglasses which protect their sight. However, if light disappears these lenses will become clear again by means of a gradual change.
This sort of lenses are mainly made of glass, although they also can be made of polycarbonate or even plastic. The resistant materials allow the consumer to practice any kind of sport without having to be worried about breaking them. Also, these materials can come in various tints which use to be grey or brown, among others, in a great variety of different designs.
Millions of molecules are contained in photochromic lenses, and these molecules are capable of changing their current appearance, becoming darker by the ultraviolet radiation produced by sun. At this point they work as sunglasses. On the contrary, if they are not exposed to ultraviolet light they continue to be transparent and any change takes place. So, when they are darkened, they can have their natural appearance again if the intensity of UV starts to change, becoming completely transparent with the absence of sunlight. With regard to photochromic sunglasses, it is important to take into account that they have been designed for outdoor use and they are not as clear as the previous lenses are. In addition, they are able to provide comfort in sunny days and besides they are pretty useful when driving.
Photochromic lenses are considered to be a good option for consumers, since they also have medical applications. They can enhance the vision of people who use to have different eye pathologies, for example, macular degeneration.
To conclude, these lenses offer the appropriate protection depending on the different light conditions. They are able to absorb about 100% of UV rays which can damage people´s eyes. For these reasons, they are excellent for people who like practising any kind of sport, being exposed to the sun, since their eyes are going to be protected all the time.
Copyright ©2016 OCEAN, S.L.
