You have just bought a pair of glasses from your optician, and he offered, for an additional fee, to add a blue light filter to protect your eyes. the What to Choose magazine reveals that this filter is not as effective as you think.
Blue light is found on our screens: smartphones, tablets and computers, on which we spend many hours a day, all generations and professions … It has harmful effects on health. Recently, we told you about cosmetic products aimed at protecting the skin from the harmful effects of blue light. But it is also very bad for the eyes, especially for the retina.
Very easily, you can get glasses (with or without correction) from your optician, allowing this blue light to be filtered. The glasses of the glasses are equipped with a special filter.
An experiment demonstrates the usefulness of filtered glasses
To prove the effectiveness of these glasses, opticians do a test with a laser supposed to diffuse blue light, when the glass passes in front, the laser light no longer passes through. Two scientists from 123 colors contacted the editorial staff of What to choose to dismantle the experience.
It turns out that these famous lasers used by opticians do not match the blue light emitted by our screens, since they are purple. However, this purple light has no interest in being filtered because it is not or very little present in our screens.
They then started the experiment again with the right laser emitting the real blue light emitted by our screens. Results ? Glass does not filter. The glasses would allow that said to protect the eyes moderately, from 14% to 17%. The estimated time of danger for the eyes in front of a screen is 1 hour, with these filtered glasses, it drops to 1 hour 10 minutes. Nothing incredible, then.
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Blue light would be “toxic” to the eyes
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