Blue Light (HEV) – Visible light, high energy and short wave length.
The cornea & lens of the eye are very effective at blocking UV rays from the light-sensitive retina & macula. On the other hand, virtually all visible blue light passes through the cornea & lens & reaches the retina.
Display screens of electronics, computers & smartphones emit significant amounts of blue light. The amount of time now spent using these devices & the proximity of screens to the user's face have health care professionals concerned about the long-term effects of blue light on eye health. Cumulative & constant exposure to blue light has the potential to cause damage to the retinal cells, leading to retinal cell death which can in turn lead to macular degeneration.
Carotenoids - Carotenoids are phytonutrients (plant chemicals), they are found in the cells of a wide variety of plants, algae & bacteria. In the human body, carotenoids act as antioxidants & provide anti-inflammatory & immune system benefits.
Lutein & Zeaxanthin are the only carotenoids found in the retina. Lutein & zeaxanthin in the macula block blue light from reaching the retina, thereby reducing oxidative damage that could lead to macular degeneration (AMD). A number of studies have found that lutein & zeaxanthin either help prevent AMD or may slow the disease.