Eye strain and blue light are major buzz words in the last couple years and it seems everyone is talking about it. From the start of the internet until December 31st 2010 there are 135,000 results on Google but from January 1st 2011 until today there are over 39,000,000 more results!
What is blue light? Blue light is a color in the visible light spectrum that is short wavelength and higher energy than other wavelengths of light. Blue light comes from the sun, computers, smart phones, TVs, tablets, and LED and fluorescent lights. Electronic devices emit more blue light than any other light.
Does blue light cause health problems? Blue light has been blamed for loss of sleep, headaches, eye strain, and even eye damage like macular degeneration. Laboratory studies on mice have shown that prolonged exposure to high intensity blue light damages retinal cells. Human studies have not shown this same negative effect on humans however because our eyes are different than those of mice.
What's the truth about blue light? Sunlight is almost all blue light and on a sunny afternoon it is about 100,000 brighter than your phone or computer screen. There have been no studies that show exposure to sunlight cause macular degeneration. So don't worry about your screens causing eye damage, but do continue to wear sunglasses outside because they are helpful.
About Matt Whitehead
I'm an Egoscue Institute certified Postural Alignment Specialist (PAS) and Advanced Exercise Therapist (AET), certified personal trainer, PatchFitness performer, FiveFingers wearer, trail runner, mountain biker, dad, music lover, environmentalist, and wanna-be slam dunk champion. I will be providing you with the latest posture exercises to help you live, play, and be pain free.