Les dangers de la lumière bleue des écrans

Digitization is taking ever greater steps to such an extent that everything now seems within reach online with their smartphone or computer.

A simple click can thus make it possible to buy products, to learn about various subjects, to play or even tobe in contact with a correspondent on the other side of the world. If all these features are generally fun and super practical, they are not without risk.

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The overexposure to screens is a real problem that undermines Internet users and technology consumers. Lights from computer, smartphone, tablet and television screens, for example, can have serious adverse health effects.

Discover the dangers of blue light from the screens of electronic devices!

Blue light from screens: what is it?

The blue light or High Energy Visible (HEV) light is part of the sunlight spectrum. It has a wavelength between 380 and 500 nanometers.

Also emitted by the screens of electronic devices used on a daily basis, this light exposes you to many risks. With the average time spent on screens which are increasingly high, the effects of these rays on health and well-being are all the more important.

The dangers to eye health

Blue light is the most dangerous light spectrum. It continually attacks when you are in front of a screen, whatever it is. The eye is the first organ affected.

Unlike ultraviolet rays which cannot enter the retina, blue light penetrates it and can damage it. We then speak of photochemical damage or photoretinitis.

Over time, these repeated exposures increase the risk of developing macular degeneration or AMD. In the absence of appropriate preventive or curative measures, the consequences can be all the greater and lead to cancer.

However, many signs can alert and invite you to turn everything off, if only for a moment. You should pay attention to symptoms like :

  • Having dry eyes;
  • blurred vision;
  • Feeling headaches;
  • Feeling eye strain, etc.

The risks of developing sore eyes are clearly higher when one is continuously exposed to screens. However, the best quality screens preserve eye health better.

The impact on sleep quality

Smartphones and many electronic screens are addictive. Moreover, various scientific studies prove this: the more we are exposed to screens, the more we want to stay there.

This explains in particular that many people find themselves still having their eyes riveted on their screen at very late hours. Note that these bad habits make the brain feel like it’s daytime. Falling asleep is then greatly delayed.

Moreover, if we wake up every day at almost the same time, it is because of the circadian rhythm which regulates all 24 hours of a day. Called again biological clockit is under the control of the hormone melatonin secreted by the pineal gland.

The dangers of blue light from screens
Credit 123RF

When the sun disappears at the end of the day, the production of melatonin increases to promote sleep. Gold, blue light emitted by the screens of smartphones and computers in particular is picked up by the retinal cells which transmit a message to the pineal gland.

It then remains at rest and the production of melatonin is considerably reduced. Slow falling asleep and non-restorative sleep ensue, which have many other negative impacts.

The effects of blue light on general mood

Usually, a bad night inevitably leads to a bad day. And it is increasingly common to sleep poorly or sleep very little due to the high exposure to blue light from screens.

Staying exposed to the blue light from your screens for a long time has a great impact on your mood and on your quality of life in general. This notably creates anxiety, loss of productivity, irritability, depression and a deterioration in the quality of social relationships.

The best solutions against overexposure to blue light

Faced with all these dangers, it is essential to take some action to be less exposed to blue lights. For this you can:

  • Opt for the use of blue light filters on your screens;
  • Wear blue light blocking glasses;
  • Favor electronic devices whose screens use advanced technologies that minimize the impact of blue light;
  • Take a few seconds break after half an hour of exposure to screens;
  • Turn off all screens 2-3 hours before bedtime, etc.

In conclusion, we note that while digital screens are of great daily use in multiple tasks, they can greatly affect the quality of life.

Eye condition, quality of social relationships and cognitive abilities may be negatively impacted by blue light emitted by the screens of telephones, televisions, computers, etc. It is therefore essential to use them sparingly.

By admin

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