"Photoreceptor cells do not regenerate in the eye".
That gives the light a straight shot to the eye's photoreceptors - light-sensitive cells in the retina. A new study conducted by the optical chemistry research division at The University of Toledo sheds light on the situation. These cells need molecules called retinal to sense light and trigger a cascade of signaling to the brain.
Blue light filters are popular on PC monitors and other displays as a way of preventing eye fatigue and reducing the risk of vision loss.More news: Google Is Tracking Your Location-Even Without Your Permission, Report Says
The study, which was published in the journal Scientific Reports, explains that blue light exposure can actually poison eyeballs.
"We are being exposed to blue light continuously, and the eye's cornea and lens can not block or reflect it", University of Toledo department of chemistry and biochemistry assistant professor Dr. Ajith Karunarathne said to UT News.More news: Hundreds Injured As Spanish Festival Platform Collapses Into Sea
To study the effects of blue light, the researchers introduced retinal molecules to other cell types found in the body, including cancer cells, heart cells, and neurons.
Macular degeneration is one of the leading causes of blindness in the United States, with about 200,000 cases reported per year cannot be cured, although it can be treated with glasses, medications or laser surgery.
Scientists add blue light is particularly damaging because it has a shorter wavelength and more energy and our eyes can not block it. Karunarathne is hopeful that the new findings might lead to the development of a preventative remedy, such as an eye drop.More news: Woods throws charge into Bellerive with wild final-round 64
"By learning more about the mechanisms of blindness in search of a method to intercept toxic reactions caused by the combination of retinal and blue light, we hope to find a way to protect the vision of children growing up in a high-tech world", Karunarathne said. In the meantime, he echoes previous suggestions to try out UV and blue light-filtering eyewear, and reduce screen time in the evenings. "Some cellphone companies are adding blue-light filters to the screens, and I think that is a good idea".