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Article: How to protect yourself from blue light?

Comment se protéger de la lumière bleue ?

How to protect yourself from blue light?


What is blue light?

Do you have trouble falling asleep at night? Do you have migraines? If you answered positively, you may be affected by blue light. Although still unknown to the general public, these rays emitted by screens can constitute a risk for your health and well-being . L'Œil de Tokyo looks back on blue light, its dangers, and how to protect yourself from it.

What is blue light made of?

Light is made up of a multitude of rays of rays of different colors. The colors of these rays are determined by their "wavelengths", located in the case of visible light between 380 and 780 nanometers.

Rays with a wavelength between 380 and 500 nanometers constitute blue light:

blue light Attention ! Not all blue light rays are necessarily dangerous! Those that pose a problem are above all rays between 460 and 480 nanometers (light close to violet).

Where does blue light come from?

The most intense, and therefore most dangerous source of blue light are LEDs . Precisely those present in the screens of computers, telephones, television, video games...

As this ANSES report states:

"In the LED lighting systems available on the market, the LEDs are often directly visible so as not to attenuate the level of illumination produced. This leads to non-compliance with the normative requirements (visual ergonomics and safety requirements) applied to lighting, established to limit high luminances in the visual field."

In other words, your screens, to remain efficient, must emit harmful light!

French exposure to blue light:

We hear it everywhere, the French - like the Japanese - are spending more and more time in front of screens : up to 7 hours a day of time spent in front of a screen for the youngest age groups. With the health crisis , but also the tertiarisation , it is likely that your exposure time has exploded in recent months: telework, remote studies ... in addition to consuming more and more screens, we have modes of lives that increasingly expose us to blue light.

This overexposure is not without consequences, especially in children and pre-adolescents under the age of 14 , in whom the crystalline lens (the lens at the back of the iris) does not filter as well as that of an adult.

What are the consequences of exposure to blue light?

Migraine, difficulty falling asleep, and even risk of cancer! Blue light is definitely the enemy of the organ of sight. Back to the effects of blue light on our pupils:

The effects of blue light on sleep:

Have you ever slept badly because you scrolled on social networks before going to bed , after using your computer, or simply after watching television?

man scroll on his phone before bed

According to a report by the National Agency for Food, Environmental and Occupational Health Safety , the biological clock in humans is regulated by blue light.

This suppresses the production of melatonin. This hormone is involved in the regulation of the biological clock and the circadian rhythm.

The Agency highlights the effects of disruption of biological rhythms and sleep, linked to exposure to blue light, even very weak, in the evening or at night - in particular via screens -.

The dangers of blue light for the eyes:

Blue light causes eye fatigue, but not only! According to a study published in the magazine Nature , the exposure of our eyes to blue light synthesizes a particle which destroys the photoreceptors, the retina, and therefore our ability to see!

Blue light therefore causes the eyes to self-destruct , and increases the risk of contracting age-related macular degeneration (AMD).

Cancer risks:

A Spanish study has highlighted the link between blue light and the development of certain cancers (breasts and prostate, in particular)! As blue light is omnipresent in major capitals, it is necessary to protect yourself as well as possible.

How to protect yourself from blue light?

Pay attention to your behavior towards screens!

To protect yourself from blue light, it is necessary to adopt responsible behavior with regard to screens: avoid prolonged exposure (for example by alternating one-hour screen sessions with 15-minute breaks), and above all do not expose yourself before sleeping.

Solutions to protect against blue light:

ANSES recommends the use of means of protection for workers particularly exposed to LED lighting, and therefore to blue light. Also avoid situations with high contrast (bright screen in a dark room, for example). Your artificial light sources must be soft (avoid LED bulbs, therefore).

Today there is a flexible and elegant way to protect yourself: blue light blockers, which filter the light to only let through the waves that will do you no harm:

Blue light blocking glasses

Tokyo Eye protects you from blue light!

Blue light blocking glasses look like regular glasses. They allow you to:

  • Reduce your exposure to blue light
  • Reduce sleep disturbances
  • Reduce headaches and eyestrain
  • Improves your ability to work on the computer for long periods of time

The treatment can be done on sunglasses as on traditional lenses . The glasses are shipped by default without correction, but are available to you by simply filling out a dedicated form:

Option at sight


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