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techkenyot.com November 18, 2018


Blue Light From Phones And Electronics Can Cause Blindness, A Study Finds

12 August 2018, 07:27 | Silvia Roy

Try and look away from the blue light if you can

A close-up of a woman's eyes and nose with a blue tint

"Blue rays of light, which have shorter wavelengths and more energy than other colors, can damage our eyes over time â€" they contribute to macular degeneration, the primary cause of blindness.

The light waves of blue color in everyday life reflections from the computer monitors, smartphones and led lamps.

While other studies have been done on how exposure to blue light affects mood as well as significantly disrupt our circadian rhythms, this is the first time that a study has looked specifically at how blue light can be detrimental to our eyes.

It kills photoreceptor cells, which do not regenerate.

Blue light emitted from smartphone and laptop screens speeds up blindness by transforming vital molecules in the eye's retina into cell killers, according to new research.

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"We are being exposed to blue light continuously, and the eye's cornea and lens can not block or reflect it", Dr Karunarathne commented.

Macular degeneration, an incurable eye disease that results in significant vision loss starting on average in a person in his 50s or 60s, is the death of photoreceptor cells in the retina. "When they're dead, they're dead for good", said Ratnayak.

Caused by the death of light-sensitive cells in the retina, while it doesn't result in total blindness the condition can make things like reading and recognising faces hard.

Kasun Ratnayake, a PhD student at the University of Toledo who was involved in the study, said: "If you shine blue light on retinal, the retinal kills photoreceptor cells as the signalling molecule on the membrane dissolves".

In the lab, the researchers combined retinal with various cells from the body, including photoreceptor cells, neurons, and heart cells.

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The researchers also discovered that alpha tocopherol, a molecule derived from Vitamin E, can prevent this cell death.

It turns out that introducing the retinal to blue light leads the molecule to have a "poisonous" reaction, the study found. But as we age, or if the immune system is suppressed, we lose the ability to fight against attacks by retinal and blue light. He explained that their experiments have shown that this exposure can lead to slow macular degeneration and a new therapy is developed to block this effect. Retinal without blue light or blue light without retinal could not kill the cells.

To protect your eyes from blue light, Karunarathne advises wearing sunglasses that can filter both UV and blue light outside, and to avoid looking at your cellphone or tablet in the dark.

Dr Karunarathne said: "That is when the real damage occurs".

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