Blue Light and Eye Protection

Light in the spectrum 380-500 nm, which is at the blue end of the spectrum plays an important role in regulating the internal biological clock. Some studies have indicated that a specific narrow band of this light may have a detrimental effect on ocular tissue.

 

This range of ultra-violet know as UV light increases the risk of developing cataract and macular degeneration. UV light is emitted by the sun, LEDs and computer screens. It has been shown that the band of light from 415 to 455 nm is potentially the most harmful to retinal cells. Spectacle treatments have been developed that will allow beneficial blue light to be transmitted while filtering the UV band that can contribute to macular degeneration and cataract. These lenses have been developed by Essilor and are called "Crizal Prevencia".