Advantages and disadvantages of blue light glasses

Nowadays, almost everyone cannot live without mobile phones. People are looking at their phones almost 24 hours a day except when they sleep. The radiation and damage caused by mobile phones to the eyes cannot be underestimated. Therefore, blue light glasses appeared on the market. Merchants claimed that blue light glasses have anti-radiation function, and many people bought them. Are blue light glasses really that magical? What are the advantages and disadvantages of blue light glasses? Let’s take a closer look at it.

Blue light blocking glasses

Anti-blue light glasses are glasses that can prevent blue light from irritating the eyes. Special anti-blue light glasses can effectively isolate ultraviolet rays and radiation and filter blue light, making them suitable for use when watching computers or TV.

Blue light is an important component of visible light. There is no separate white light in nature itself. Blue light is mixed with green light and red light to produce white light. Green light and red light have lower energy and cause less stimulation to the eyes. Blue light has a short wave and high energy. It can directly penetrate the lens and reach the macular area of ​​the eye, causing macular degeneration.

The market for anti-blue light glasses is a mixed bag with a wide variety of products. Professional digital protective glasses are more popular in the market in 2013. Due to the absorption design of the lenses, they completely block harmful ultraviolet rays below 400nm and absorb high-energy blue light of 400-500nm, thus preventing harmful light from causing damage to the eyes. Therefore, professional digital protective glasses are not just blue light protection glasses, but professional protective glasses that combine blue light protection, radiation protection, and UV protection.

There are many layers of film on the anti-blue light glasses on the market, including amethyst film, gold film, blue film, green film, yellow-green film, etc. In fact, this film layer has little effect on the anti-radiation effect, but the inner film with high strength and chemical resistance is more important. It can directly penetrate the glare shot from the oblique rear to the inner film through the film, blocking the harm of reflection to the human eye.

The colors of anti-blue light glasses sold in many places now are different. But when viewed with the naked eye, the lenses of real blue light blocking glasses appear to have a special faint yellow light. More importantly, real blue light blocking glasses need to be tested by an authoritative organization.

If we do a rough inspection, we can use a grating spectrometer or a banknote detector light to test the lens's anti-blue light effect. As for UV protection, most eyewear stores have testing equipment that can easily identify whether it is UV protection.

Of course, in order to better protect your eyes in front of the computer, we need to block blue light while eating more vegetables, supplementing lutein, multivitamins and zeaxanthin to enhance the antioxidant capacity of the eyes and thus protect our eyes.