Your body naturally responds to blue light for regulation of your sleep-wake cycle.
The problem is that artificial, High Energy Visible (HEV) blue light emits from most electronics you're exposed to, like LED lights, TV, computers, phones and tablets.
HEV blue light has shorter wavelength than other colors in the visible spectrum causing light to scatter outward, decrease contrast and strain your eyes.
This has been proven by Harvard University The Sleep Foundation, The American Journal of Epidemiology, and many more!
Symptoms of over exposure to blue light include blurry vision, difficulty focusing, dry and irritated eyes, eyestrain poor sleep, and even issues like weight gain and dry skin.
In fact, blue light related complaints, specifically digital eyestrain, has now carpal-tunnel syndrome as the biggest computer related complaint!