Does blue light destroy the cells of your eyes?

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?Does blue light destroy the cells of your eyes

During the day, blue wavelengths can be useful, as they play an important role in controlling the daily rhythm, affecting focus and mood.

But we did not create as much exposure to it as we do now, as in addition to the abundant blue light in the sunlight, most of the light we see through digital devices is also blue.

The negative effects of blue light on the eyes
Increasing evidence suggests that blue light has a bad effect:

At night, blue light can stop melatonin secretion and cause disruption in our daily rhythms.
Recent studies have shown that prolonged exposure to blue light can damage the retina, although how it happened was not clear.

Blue light and retinal
A new research shows that when blue light hits a molecule called retinal, it releases a series of chemical reactions that can be toxic to cells in the retina.

It's a bit contradictory, because we need retinal is a form of vitamin A that helps us to see.

There are two types of photoreceptor cells in the retina that are responsible for light detection:

Rails, which form the majority and rely on a protein called rhodopsin for the discovery of light.
Cones.
The retinal molecule is able to absorb light and has its own place inside the rhodopsin protein.

When light photons hit the retinal, their shape changes very little, but because there is not much space, they move a part of the rhodopsin off the road. This slight physical modification results in chemical changes that eventually send signals through the optic nerve in the brain.

Results:
The researchers found that the exposure of HELLA cells (which were used as an alternative to photoreceptor cells) to blue light in the presence of retinol causes the deformation of an important protein in the cell membrane, increasing oxidative damage and calcium levels in the cells.
The results indicate that when the blue light is on retinal, the retinal cells destroy the photoreceptor cells where the signaling molecule dissolves on the membrane.
The receptor cells do not regenerate in the eyes.
No toxic effects were observed if Retinal was absent when the HeLa cells were exposed to blue light.
There was no toxicity associated with retinal when researchers used other wavelengths of light, such as red, yellow, or green.
The researchers found that when an antioxidant molecule called alpha-tocopherol is a form of vitamin E, it reduces damage caused by blue light and retinal and prevents cells from dying. This is why our vision does not deteriorate quickly after exposure to all this amount of blue light.
Unfortunately, with progress, vitamin E levels decrease and we lose and lose this protection.
The gradual destruction of light-detecting cells in the eye due to prolonged exposure to blue light can contribute to age-related macular degeneration, the main cause of blindness, the researchers note.
By learning more about the mechanisms of blindness to find a way to intercept toxic reactions from the combination of blue light and retinal, researchers hope to find a way to protect the vision of children growing up in a high-tech world.

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