The recently published study found that when exposed to blue light retinal can turn against the body, generating the types of chemicals that destroy photoreceptor cells. These molecules killed the cells when exposed to blue light.
Macular degeneration, sometimes referred to as age-related macular degeneration or AMD, is a condition that results from the breakdown or thinning of cells in the macula - a part of the eye's retina that's important for seeing fine details.
All smartphone and tablet screens also emit blue light.
The study, undertaken at the University of Toledo, describes how blue light, which has a shorter wavelength and more energy compared to other colours, can gradually cause damage to the eyes. "When they're dead, they're dead for good", said Karunarathne.
The light waves of blue color in everyday life reflections from the computer monitors.
Experts say that blue light irradiation leads to the activation of the photosensitive molecules of retinal, which changes the state of the phospholipids involved in cell signaling pathways. "Photoreceptors are useless without retinal, which is produced in the eye".
"We are being exposed to blue light continuously and the eye's cornea and lens can not block or reflect it". This was revealed when researchers studied what happened when blue light was shone onto different types of cells from the body. Researcher Ajith Karunarathne said that "We are being exposed to blue light continuously, and the eye's cornea and lens can not block or reflect it".
According to researchers, the blue light from laptops, smart phones and other digital devices, could raise the risk of blindness. When exposed to blue light, these cell types died as a result of the combination with retinal.
The researchers also discovered that alpha tocopherol, a molecule derived from Vitamin E, can prevent this cell death. But as a person ages or the immune system is suppressed, the patients loses the ability to counteract the harmful combination.
"You need a continuous supply of retinal molecules if you want to see", researcher Ajith Karunarathne said in a press release.
Dr. Karunarathne urged anyone concerned to wear sunglasses that filter UV and blue light and to avoid browsing on digital devices in the dark.
"If you look at the amount of light coming out of your cell phone, it's not great but it seems tolerable", Dr. John Payton, visiting assistant professor in the UT Department of Chemistry and Biochemistry, said.
Dr Karunarathne said: "That is when the real damage occurs".