Blue light

Published by Caroline Lamarque on

We hear a lot of warnings about the blue light diffused by our screens, but what do we really know about it? Let’s recall together what this famous blue light is, the consequences it can have on our health and the solutions that exist.

~ Explanations ~

Blue light is a hot topic because of its omnipresence in our daily lives through LEDs and screens. However, we must not forget that its greatest natural source remains the Sun.

Blue light is part of the visible light spectrum. As a reminder, we can consider that the human eye can observe the wavelengths between 400 and 800 nm. Below, we find the ultraviolet and above, the infrared. However, blue light is present between 380 and 500 nm.

~ Consequences ~

If blue light is so much talked about, it is because of its harmful consequences on our health. It is indeed a risk factor of retinal degeneration and disturbs our internal clock, and thus the sleep cycles. It would also accelerate the aging of the skin.

However, this is mainly due to the consequences of blue light, some of which is violet. That tending towards turquoise blue can, for its part, have positive effects on morale. In addition, it is good to remember that the blue light spectrum, thanks to a particular medical treatment, is also used to diagnose and treat certain types of cancer. It is also a tool in phototherapy to treat acne.

~Solutions ~

We can try to adapt the sources of blue light that we use on a daily basis. For example, we can favor the e-reader (whose LEDs are only used for lighting) to the tablet, but provided that we do not have colored reading such as comics or comic books. It is also possible to use applications that serve to filter this type of light or to swap some LEDs for other types of bulbs, but which would be less environmentally friendly.

Finally, there are the famous blue light filter glasses. This solution effectively limits the diffusion of this type of light. However, it is not suitable for all profiles, especially for professionals who work with color. Indeed, since the glasses of these glasses are slightly tinted, they alter the perception of colors. This option is therefore not optimal for graphic designers, colorists or 2D or 3D artists whose work would suffer.

To conclude, we must not forget that blue light is what we call a risk factor and that, by definition, prolonged exposure to it can have no effect on some people. In fact, it’s all about moderation and use, like many other things!

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