Take classes online, telecommute, shop online… Data shows that the average monthly usage time of Chinese mobile Internet users has reached 144.8 hours. Against this background, one kind of product is in high demand, it is to protect the eyes, relieve visual fatigue as the selling point of anti-blue light lens.
The anti-blue light lens has received mixed reviews, with some saying it is a tax on intelligence and others saying it protects the eyes. Is blu-ray lens useful? Ni Wei, director of ophthalmology at Xi ‘an International Medical Center Hospital, will share with you the knowledge of anti-blue light lenses.
What is blu-ray?
Blue light does not refer to the blue light, but the wavelength of 400-500 nanometers of visible light is called blue light. The light source used in daily LED lighting fixtures and display products (mobile phone/flat panel/TV) is mostly LED light source excited by blue light.
Is Blue light bad for your eyes?
Not all blue light is bad for you. Human eyes have very low tolerance to blue light radiation in the 400-440 nanometer band. When the light intensity enters this threshold, photochemical damage is easy to occur. However, blue light radiation in the 459 — 490 nanometer band is very important to regulate the circadian rhythm of the human body. It can affect the secretion of melatonin in the human body, and then affect the body clock, alertness and mood.
What we want to guard against is blue light from artificial sources. Because of its short wavelength and strong energy, blue light can directly reach the retina of the eye, which can cause irreversible damage to our eyes. In light cases, it can cause blurred vision and decreased vision, and in serious cases, it can lead to lesions in the macular area and even blindness.
In our daily life, the main sources of blue light are mobile phones, computers, tablets and other electronic products. Anti-blue light glasses on the market, one is in the lens surface coated with a layer can reflect short wave blue light film layer, the principle of protection is reflection; The second uses colored lens materials to absorb and neutralize blue light. These lenses are usually yellowish. Pale yellow glasses are better at blocking blue light.
Therefore, we are not paying an IQ tax to buy blue – ray lens, but to pay attention to the health of the eyes.
Post time: Aug-20-2021