What Are Blue Light Blocking Glasses

Introducing anti-blue light glasses

Anti-blue light glasses are glasses with special lenses, which are specially designed to reject the harmful rays of electronic devices. Since they are mainly used for those who work in front of a screen, they are also called computer glasses. How do they work? These glasses have filters in the lenses that block or absorb the light of the devices. The use of best blue light blocking computer glasses in front of the PC or tablet reduces the influence of the rays and, consequently, limits the unpleasant consequences of exposure, but above all improves the sleep/wake ratio.

Anti-blue light glasses can also be corrective, i.e. at the same time correcting a visual defect, such as myopia. It is always advisable to remember to take breaks during prolonged exposure of the eyes to the screen, but the anti-blue light glasses allow you to spend several hours in contact with the rays without suffering fatigue.

What are the benefits of blue light glasses?

The use of these glasses is a valuable precaution that can be adopted by both eyeglass wearers and those who do not have visual defects. The anti-blue light treatment helps you to:

  • Reduce the action of blue rays
  • Improve contrast and visual comfort
  • Minimize glare and reflections on the lens

Modern ophthalmology and anti-blue light glasses

In recent years, among the various treatments available for eyeglasses, the anti-blue light treatment has acquired an increasing importance. Even those with no visual deficiencies will surely have heard of this solution that is being adopted in conjunction with the increase in the use of electronic devices, especially for intellectual labor workers or for those who, in any case, find themselves in front of the screen for several hours a day.

Here is everything you need to know about glasses with anti-blue light lenses.

The phenomenon of blue light

Light is a radiation that can present itself in different forms, for example particles or waves. The latter are those that are perceived by the human eye, and are grouped in the visible electromagnetic spectrum: this includes wavelengths between 380 and 780 nanometers. Radiation above or below this threshold is not detected, and includes X-rays and UV rays, which are impossible to see with a naked eye.

In the spectrum that affects human vision, colors can be found, each linked to a specific wavelength: in the lower ones we find violet and blue, while in the higher ones we find yellow and red. Specifically, blue light is located between 380 and 500 nanometers, and is emitted both by the sun (which also floods us with all the other frequencies, and for this reason appears white), as well as by the screens of electronic devices and LED lamps.

Blue light and electronic devices

With the advent of the digital age, new problems have arisen related to the well-being of those who, for work, find themselves looking at the screen for several hours a day. Not only that: the dissemination of content even on smaller screens such as tablets or phones can create some problems even during free time. In particular, many complain of symptoms attributable to computer vision syndrome, a disorder that involves eyestrain, dry eyes and, in severe cases, a sense of general fatigue.

These symptoms can occur when one is in front of a computer, television or mobile phone for an extended period of time, and is brought about by the strain that the eyes make, which is similar to reading a book. To counter the effects of the syndrome, some techniques can be adopted to “relax” the eyes, taking them away from the screen every twenty minutes and staring at an object 20 meters away for twenty seconds.

Glasses with anti-blue light lenses are also recommended to reduce or counteract computer vision syndrome, especially for those who have to find themselves in front of the screen even in the evening.

The effects of blue light on the sleep cycle

One of the most known negative effects of blue light is the influence it has on the sleep cycle, a problem that can induce insomnia and difficulty in relaxing in many individuals. This is linked to the production of specific substances that send signals to the brain: for example, cortisol, the hormone that wakes us up because it indicates that it is still daytime. It is precisely for this reason that spending long hours in front of the screen and in blue light can cause sleep disturbances, as it inhibits the increase in melatonin, which has a relaxing function.

In a nutshell, the irradiation that our eyes undergo while watching TV, playing on the computer or surfing the internet on a mobile phone in the evening can confuse the brain, making it believe that it is not yet time to go to sleep and, for this reason, stimulating our body in a harmful way.

How blue light glasses work

The lenses of these models have a filter that allows to mitigate the action of blue light on the eyes of the wearer, so that you can focus on the screen more easily, making clearer and more understandable not only the written text, but graphics or colored images as well. Some glasses of this type also have yellow lenses, which can further facilitate the filtering action of the light coming from the LEDs of the electronic devices.

In general, glasses with anti-blue light lenses are recommended for those who already have vision problems, but you must be very careful: even in the case of perfect vision it is very easy to develop computer vision syndrome, particularly unpleasant for workers or students who have to work late on text, graphics or spreadsheets. Once these devices are worn, however, it is good not to forget the small tricks that allow you to rest your eyes briefly, such as looking away from the screen or using the appropriate lighting.