Blue light from phones, tablets may fast-track blindness

12 Août, 2018, 19:28 | Auteur: Yves Courtet
  • Blue light emitted from smartphones and other digital devices can accelerate blindness by transforming vital molecules in the eye's retina into cell killers a study has found

The study, published in the journal Scientific Reports, found that blue light exposure causes retinal to trigger reactions that generate poisonous chemical molecules in photoreceptor cells.

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

The study found blue light turns a molecule in the eye into a cell-killing poison.

As more research is needed, those involved in the study say to avoid looking at screens at night - and that scientists should look into developing an eye drop that could perhaps ward off some of the damage caused by the ubiquity of screens with blue light, WTOL reported. "Photoreceptors are useless without retinal, which is produced in the eye".

A new study by the Toledo University in OH found that blue light from digital devices triggers the production of a toxic chemical that kills light-sensitive cells in our eyes.

"It's no secret that blue light harms our vision by damaging the eye's retina", he added.

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The researchers focused on a form of Vitamin A called retinal, which photoreceptor cells use to covert light into signals that get sent to the brain.

"Macular Degeneration is one of the leading causes of blindness in the United States and all around the world", said assistant professor in the UT Department of Chemistry and Biochemistry, Ajith Karunarathne. Further, they have also discovered that alpha tocopherol can prevent cell death caused by blue light and retinal.

The resulting damage can speed up macular degeneration - a condition that affects that can blur out the middle part of our vision. Because of this, in the cytoplasm, sharply increasing the concentration of calcium, which can eventually lead to cell death.

Ratnayake said once these photoreceptor cells are dead, they are dead "for good" and can not be regenerated. But as we age, or our immune system takes a hit, we lose the ability to fight against the toxic retinal attack - and that's when the damage occurs. When combined with neurons and cancer cells, retinal that had been exposed to blue light killed them all - suggesting it could do the same to those found in the human eye.

Dr Ajith Karunarathne, an assistant professor in the university's Department of Chemistry and Biochemistry, said: "We are being exposed to blue light continuously and the eye's cornea and lens can not block or reflect it". 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.

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