Sunlight is made up of red, orange, yellow, green, blue, indigo and violet light. When combined, it becomes the white light we see. Each of these has a different energy and wavelength. Rays on the red end have longer wavelengths and less energy. On the other end, blue rays have shorter wave lengths and more energy. Blue light reaches deeper into the eye and its cumulative effective can cause damage to the retina.
Sunlight is the main source of blue light, and being outdoors during daylight is where most of us get most of our exposure to it. But there are also many man-made, indoor sources of blue light, including fluorescent and LED lighting and flat-screen televisions.
Blue light exposure you receive from screens is small compared to the amount of exposure from the sun. And yet, there is concern over the long-term effects of screen exposure because of the close proximity of the screens and the length of time spent looking at them. Many believe children’s eyes absorb more blue light than adults from digital device screens.
So what can you do to protect your family?
If you can't limit the amount of screen time you are exposed to, ask about Crizal Prevencia, it is a blue light filter coating that helps ensure the long-term health of your eyes. This can be added to any prescription eye glasses purchased at insight eyeworks.