Why choose blue anti-light eyeglasses

This is what some testimonies describe on the forums of the websites. It is not impossible, but not proven: the hypothesis is being tested, it has not yet been demonstrated. Of course, it is also possible to solve the problem by getting artificial tears, taking care to vary the positions of the gaze, and to place the screen slightly below so as not to spread your eyes. But it’s less pretty than a pair of glasses.

Are the blue anti-light glasses effective ?

These glasses that filter the blue light of the screens are fashionable in opticians. Manufacturers are trying to convince us to buy protective glasses emitted by our screens, especially the blue. Are they effective ? Do they really reduce eye fatigue ? Responses from our experts.

Posted by Jasmine Saunier | Updated on Apr 3. 2023 by Mathilde Pujol Experts: Pr Gilles Renard, scientific director of the French Ophthalmology Society; Pr Éric Souied, ophthalmologist.

• Why wear glasses with blue anti-light glasses ?
• How to know if you need blue anti-light glasses ?
• These rest glasses only filter part of the blue light
• Blue anti-light glasses may reduce visual fatigue
• No, these computers’ glasses do not protect DMLA !

“The screens tire our eyes”, “They are harmful”… It is true that today we are going on average 5 to 7 hours a day in front of our screens smartphone, computer, tablet or television. What raise some concerns for the general health of our eyes.

Why wear glasses with blue anti-light glasses ?

Blue light is part of the light visible by our eyes, Composed of several levels of blue, ranging from turquoise blue to purple blue. It is this last zone that is dangerous for our health.

These are certain wavelengths in purple blues, from 415 to 455 nanometers. More energetic than others, They hit the retina with more power. We find blue light everywhere, including in natural light and in computers, smartphones, tablets, television or even in LED bulbs. But the OLED screens have proportionally more. THE Interior lighting LEDs Also, that’s why specialists advise buying “White hot”.

Blue anti-light glasses are designed for filter part of the light spectrum. They would therefore protect the retina from these more powerful wavelengths.

How to know if you need blue anti-light glasses ?

The effects of purple blue light on retina cells were demonstrated: in 2013, a study by the Vision Institute showed that Violet blue light could destroy cells from the pig retina, and cause damage comparable to those of age -related macular degeneration (DMLA). But this observation was established under conditions of experimentation which do not have much to do with reality.

“We do not know what are the effects of dark blue light in real conditions, but one might think that it is certainly toxic, especially in children including the corneal and the clearer crystalline lets pass almost all of the blue “, explains Professor Gilles Renard, scientific director of the French Ophthalmology Society. Repeated exposure could have cumulative effects over time, creating a potential long -term risk. The youngest are therefore the only ones to be really concerned.

In a recently published statement, the Academy of Medicine has also recommended the use of protective glasses for children in the event of prolonged exposure to screens (Source 1). She gave other advice to limit the damage that blue light can cause (she delays among others the secretion of melatonin, sleep hormone).

These rest glasses only filter part of the blue light

On a daily basis, our screens can expose us to purple blue wavelengths, it’s true, but not all. Only the most recent LED technologies produce a light spectrum composed of more blue light than natural light, and not all are equivalent.

THE LCD screens lit by diodes pose little problem, says Profe. Because light crosses the liquid crystal slab, and is not directly transmitted to the user. Conversely, in OLED or AMOLED screens, Each diode is on the surface of the screen, the more we look closely, the more light we receive. It is then preferable to limit the exposure time and to keep them away as much as possible from the eyes.

Their glasses consist of the same materials as corrective glasses, of the synthetic resin, most of the time. They then receive a treatment that reflects part of the purple blue waves and prevents them from entering the eye.

Opticians’ promise isStop 30 % to 40 % of all blue light. According to Profe, This benefit is overestimated : “They do not filter all the problems of the problematic wave, and they only manage to stop approximately 20 % of those which they attenuate: it is very insufficient to be able to assert the eye”.

Blue anti-light glasses may reduce visual fatigue

This is the second advanced medical argument with which ophthalmologists do not agree: “The computer is a revealer”, explains Professor Souied, ophthalmologist. “”Headaches or periorbital pain at the end of the day mean you probably have a Uncharted visual defect. You compensate by efforts of the muscles of the eyes, which causes visual fatigue “. In this case, the only thing to do is make an appointment with your ophthalmologist.

Rest glasses against discomfort and irritation due to long hours spent in front of the screen

However, when we spend long hours in front of the computer, the concentration can make us slow down the pace of the air blinking, and thus cause embarrassment and irritation. In this context of ocular drought, blue anti-light glasses could bring a little comfort.

This is what some testimonies describe on the forums of the websites. It is not impossible, but not proven: the hypothesis is being tested, it has not yet been demonstrated. Of course, it is also possible to solve the problem by getting artificial tears, taking care to vary the positions of the gaze, and to place the screen slightly below so as not to spread your eyes. But it’s less pretty than a pair of glasses.

No, these computers’ glasses do not protect DMLA !

Age -related macular degeneration (AMD) is a degenerative disease of the chronic development retina which affects people over 50. “It reaches the macular region, that is to say the central area of ​​the retina, resulting in a gradual loss of central vision, fine of details (discomfort for close reading, driving …)”, indicate the Civil Hospices of Lyon (HCL) (Source 2).

Certain ambiguous advertisements suggest that blue anti-light glasses can preserve us from DMLA, characterized by the appearance of a black spot in the middle of the field. Enough to make Pré Éric Souied, DMLA specialist: “This is a marketing argument ! No glass can protect against this 70 % genetic “disease”.

Rather than buying glasses, it’s better to .. stop smoking. “This is the main modulator factor of the AMD, which increases the risk by 4 to 6 times”, he recalls. The clearly defined risk factors of DML are indeed age and tobacco.

What is the price of blue reflective glasses ? Where to buy them ?

To date it exists No standard to classify blue anti-light glasses. It is therefore difficult to attest to their effectiveness. You can get it in pharmacies or an optician, or online on specialized store sites or at generalist resellers. You will not needprescription that if your glasses have corrective lenses. Simple blue anti-light anti-correcting glasses do not require a prescription. Their price is relatively accessible: we find them from around twenty euros.

Why choose blue anti-light eyeglasses ?

We spend more and more time in front of the screens. At the office, at home and even in transport, our eyes are riveted on the computer, smartphone and television. By force, our eyes are victims of eye fatigue. Sometimes the situation can even get worse. This situation is due to the blue light that the screens give. Consequently, how to meet your professional obligations or even enjoy a good film without damaging your sight ? The best answer is called the blue anti-light filter. This one dresses classic glasses as well, through a treatment as the specialized glasses which do not correct vision. What are the characteristics of blue anti-light glasses ? Why and how to choose them ? Here are some answers.

What is blue light ?

The visible light of the human eye consists of a palette of colors. Each of them associates with a more or less short wavelength. To put it simply, the shorter a wavelength, the more it produces a significant energy flow. The blue color (from blue-violet to turquoise blue) is classified among the shortest waves of the light spectrum, around 380 to 500 nanometers. Blue light is not only artificial. Originally, the sun was represented as the main supplier. However, our contact with light has increased considerably in the past twenty years, with the Multiplication of screens. Indeed, the computer, the smartphone, the television and the tablet represent so many vectors of blue light. This type of light is more dangerous for health. In its natural state, blue light is not particularly harmful to the human eye. On the contrary, some pallets are beneficial for our organization. Thus, turquoise blue acts as a sleep regulator. This color blocks the secretion of melatonin – the hormone responsible for sleep – in our brain. This is why we are more inclined to sleep at night. In addition, natural blue light helps keep morale. It is this lack of brightness that leads to ambient gloom in winter.

Blue light: the effects on our health

On the other hand, artificial blue light and in particular LED remains much more intensive than that generated by the sun. The screens send us a light up to a thousand times more intense than the level supported by the retina. A prolonged exposure Can cause age-related macular degeneration (DMLA), that is, premature aging of the retina.

The harmful effects of blue light

• a eye fatigue ;
• headaches ;
• concentration disorders;
• Memory losses.

A harmful light for sleep regulation

The extension of the time spent in front of the screens alters sleep cycles. In addition, a night and close -up exhibition with bedtime leads to trouble to fall asleep. Indeed, the secretion of melatonin occurs an hour, even two after the end of contact between the eyes and the blue light. Sleeping sleep therefore takes place, while the body secrete enough. Sometimes artificial light can even Insomnia.

The effects of blue light on children

The children’s eye system is more sensitive to the light of screens. In case of too frequent prolonged contacts, they risk a retina deformation and can develop vision pathologies. In addition, concentration and memorization, two capacities in full development during childhood, are weakened by the exposure to blue light.

Blue anti-light glasses: the solution to protect your eyes

The wavelength of the most dangerous light spectrum for the retina is blue-violet. Turquoise blue light is essential for our health. The ideal is therefore to filter the most harmful part of the spectrum and let natural blue pass. It is for this purpose that the blue anti-light glasses were designed.

Filter all blue light is possible

Of course, it is possible to protect the eyes from any type of natural blue light, as artificial. This involves wearing extremely tinted glasses. Nevertheless, these glasses are difficult to wear permanently: impractical in front of a screen, the port is even prohibited by driving. On the other hand, if the eyeglasses only filter part of the blue-purple light (around 20 %), the distinction of colors remains optimal.

Choose your blue anti-light glasses: the different models

There are three main types of blue anti-light glasses:

• Glasses at filtration rate less than or equal to 20 %. These simple screen models are suitable for people who spend less than 4 hours a day in front of the screens;
• blue anti-light glasses multifunction. These filter blue light and also UV rays. The filtration rate is higher than that of simple screen glasses. These glasses are intended for multiple use in order to alleviate eye fatigue. The carrier can use them at work, by car or reading;
• Gaming glasses filter up to 95 % of blue light. The pair is especially suitable for gamers spending many hours in front of the screens.

How to choose your blue anti-light eyeglasses ?

The pair of blue anti-light anti-light glasses is intended for bearers who require visual correction as well as those who have no eye problems. Even lentil wearers can use this type of glasses. It’s thanks to theAdding a filter that glasses are today capable of protecting the eyes from harmful blue light. The technology used to filter it depends on marks: some favor the addition of UV anti-ray molecules, others incorporate surface treatment of glasses. Finally, some manufacturers combine the two solutions.

Several criteria determine the type of blue anti-light glasses adapted to the carrier:

• The average time spent in front of one screen per day;
• The filtration rate of blue light, knowing that below 20 % the protection remains ineffective;
• the shape of the glasses;
• design ;
• the solidity of the frame;
• the price.

Other ways to reduce its exposure to blue light

Port of blue anti-light anti-light glasses is the best way to protect your eyes. Other solutions can support this resolution. First, we can try to reduce your screen time medium per day. Knowing that a Frenchman spends an average of six hours a day in front of the screens (computer, telephone and television). Ideally, you have to reduce screen time in the evening and at night, at least two hours before sleeping.

It is also essential to reduce the brightness screens. Be careful, the brightness of the screen must be more or less at the same level as the exterior light level. Thus, it is better to lower light and go into dark mode at night or by low sunshine. Finally, the effects of blue light fall asleep if we regularly take breaks of a few minutes every twenty minutes to two hours maximum.

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