The screen of the smartphone destroys the retina

The screen of the smartphone destroys the retina

I found an interesting and probably important for us all statement of scientists who paid attention to the relationship between the use of electronic gadgets and the occurrence of various visual defects - from the usual overwork to glaucoma and retinal degeneration.

Pancake! In the tin! The same applies to each of us, children, adults! Well, let's take a closer look at the fact that scientists have unearthed it again ...

The human eye is able to see only a small part of the spectrum. The shorter waves appear blue to us, and the longer ones appear red. And if to speak at all - what looks like white, be it sunlight or a monitor screen, actually contains almost every color of the visible spectrum.

In a recent paper published in the journal Scientific Reports, researchers from the University of Toledo studied the process by which prolonged exposure to a short wave, of the order of 445 nm, called “blue light,” can cause irreversible damage in the eye tissue.

Research results can have profound implications for consumer technology.

Body chemistry

The human visual system is a finely tuned mechanism. Retinal, one of the forms of vitamin A, plays a major role in the process of vision.

Retinal, as a substance is part of the main visual pigments and is involved in the creation of nerve signals from which the brain forms an image.

Since photoreceptors become completely useless without retinal, it must be constantly produced in the retina.

Experiment

Under laboratory conditions, eye cells are exposed to "blue light", which in theory mimics the process when we look at the screen of a phone or computer.

It was found that under the action of "blue light" retinal triggers reactions, during which substances dangerous to the cells of the retina appear. "Blue light" causes the retinal to oxidize, resulting in toxins.

This is what leads to age-related macular degeneration, when the immune system gradually ceases to protect organs from destruction. The photoreceptor cells die and are not restored.

Got into the taste

In the course of the experiment, scientists introduced retinal into a wide variety of cell types, including heart, cancer and nerve, and then exposed the samples to light of different wavelengths. And each time, under the rays of the blue part of the spectrum, the cells died, while other types of lighting did not have a negative effect.

Findings?

Ultraviolet or “blue light” is a natural part of sunlight, which, among other things, contains other forms of invisible light - infrared rays. But, unlike smartphones, we do not spend much time looking at the sun. In childhood we were taught not to do this.

Is the smartphone dangerous? Catastrophic damage to vision is hardly guaranteed. But the experiment shows that “blue light” is capable of killing photoreceptor cells. The death of a sufficient number of such cells can lead to macular degeneration, an incurable disease that greatly impairs and even completely deprives of sight.

But there is also good news: it turned out that nature has a medicine - antioxidant alpha-tocopherol, a derivative of vitamin E. It protects retinal from oxidation when it is affected by ultraviolet light.

Unfortunately, over time, when the body is aging or when the immune defense weakens, the ability to fight the effects of "blue light" thus disappears.

By the way ...

... this is why they use the function of limiting the brightness in Windows 10. "Night Light" softens the light of the display so that it does not tire. Enable and configure is easy.

Step 1. Open the settings menu by performing a search in the Windows 10 search window, or press the Windows key + X, and then follow: “Settings” → “All Settings”.

Step 2. Select "System".

Step 3: Press "Display" in the left menu.

Step 4: Go to the "Parameters of night light."

Step 5: Set up the “Color Temperature at Night”.

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