1, three principles of guarantee. Zhang Jian suggested that no matter what kind of glasses you use, you need to meet three principles: seeing more clearly, seeing more permanently and using more comfortably.
2. Qualified products must be selected. Anti-blue lens is divided into two types: one is light orange lens with colored substrate, which is not suitable for wearing for a long time; The other is to prevent blue light from penetrating through the surface film layer, and the background color is light. From the effect point of view, there is little difference between the two types of lenses in preventing blue light. The latter is more advanced in technology and superior in optical performance. It should be noted that qualified optical lenses must be purchased and have certain blue light prevention effect.
3. Not everyone is suitable. Zhang Jian said that anti-blue glasses are only suitable for people who use electronic products for a long time, not for people who are tired. Teenagers and children should not wear it for a long time. These glasses will form a high barrier blue light, which is easy to cause color cast and aggravate visual fatigue. Parents can't use blue glasses as "amulets". If the child wears it for a long time but does not control his eyes, it will do more harm to his eyes.
Extended data:
Blue light is an important part of visible light, and there is no single white light in nature. Blue light is mixed with green light and red light to present white light. Short-wave blue light is a kind of light with relatively high energy, and its wavelength is between 400 and 480 nanometers. Blue light within this wavelength will increase toxins in the macular area of the eye, leading to macular degeneration. Blue light exists in computer monitors, fluorescent lamps, mobile phones and other light. Special anti-blue glasses can isolate ultraviolet rays and radiation, filter blue light, and are suitable for watching computer or TV. For people who use electronic products for a long time, anti-blue glasses can really prevent some harmful blue light from hurting their eyes.
People's Network-Anti-blue glasses should not be worn for a long time