As digital device use increases, more and more people suffer from digital eyestrain symptoms. One cause of this is believed to be the blue light emitted from the displays of such devices. Light is a form of electromagnetic radiation that carries energy. The shorter the wavelength, the stronger energy. Because blue light has the shortest wavelength in the visible light spectrum it carries the highest amount of energy. Recent evidence suggests that blue light causes more damage to the retina, in particular with the development of age-related macular degeneration, which is the third leading cause of blindness worldwide.

Blue light, in particular at the 450nm point, is hard on the eyes for several reasons. This is the area that digital devices produce and this blue light is the only light that penetrates the eye all the way to the back to the retina.  Blue light between 380 and 470nm is considered bad blue light because it can cause accumulated damage to the retina, cause cataracts, and is linked to sleep disorders.

All blue light is not bad though. Blue light from 470 to 500nm, also called blue turquoise light, is generally considered good for you. This range of visible blue light is beneficial because it provides natural reflexes protecting eyes from light overexposure and helps cognitive and memory function. It also stimulates the photosensitive retinal ganglion cells, stimulates pupillary reflex and controls the circadian cycle.

Other blue light blocking lens solutions only add coatings on the lens surface to reduce the amount of blue light that passes through the lens and into your eye. This has a very limited effect and only blocks about 10 to 20% of the harmful blue light.

Syght lenses are carefully formulated to filter and balance light while absorbing 65% of (HEV) blue light emitted from digital devices. By designing our lenses to shift the color spectrum for visual efficiency, the Syght copper lens takes artificial light and precisely tunes it to the physiology of the eye.

Initial research into the adverse effects of blue light on patients who suffer from Post Concussion Syndrome has shown that wearing Syght can help reduce symptoms such as headaches, vertigo, difficulty concentrating, and light sensitivity. In addition, Syght has recently been receiving a growing number of claims from concussion sufferers that our eyewear has helped.

Northwestern University recently studied how artificial blue light affects the body’s metabolism and ability to produce insulin. Knowing past findings have shown that blue light triggers certain chemicals in the brain, researchers discovered that exposure to blue light not only adversely affected metabolism, but also increased insulin resistance. Ultimately, blue light can potentially lead to weight gain and even increase risk of diabetes.