Blue light is an important part of visible light, and there is no single white light in nature. White light appears when blue light is mixed with green light and yellow light. Green light and yellow light have low energy, little irritation to eyes, short blue light wave and high energy, which can directly penetrate the lens and reach the fundus retina.
Blue light does not mean blue light, but high-energy visible light with a wavelength of 380-500 nanometers, which is the strongest light among visible light. Blue light generally exists in Yuba, computers, projectors, laser pens, fluorescent lamps, mobile phones, LED display screens, LED lights, outdoor light boxes and movie screens. These appliances or light sources have different degrees of blue light.
The harm of blue light to vision;
Research by WHO like eyes Association and famous eye hospitals in China shows that:
Blue light can penetrate the lens and reach the retina, causing optical damage and accelerating the oxidation of cells in macular area. Its damage to the eyes is gradually accumulating. Even if you don't look directly at the light source, it will do harm to your eyes after a long time.
LED and computer background light artificial light source retain a lot of blue light, making artificial light whiter and brighter. Some particularly white light always feels blue, which is caused by the high proportion of blue light. The visible light emitted by new artificial light sources such as computers, TV screens and energy-saving lamps contains a lot of short-wave blue light with irregular frequency. Long-term blue light irradiation on retina will produce free radicals, which will lead to the decline of retinal pigment epithelial cells, thus causing various ophthalmic diseases such as retinopathy. Household LED lighting should be used as little as possible, especially the LED eye protection lamp is in the experimental period, and LED is only suitable for auxiliary lighting.
So for us normal people, blocking blue light for a long time is the most effective way to reduce the damage, and using anti-blue glasses can effectively solve this problem. Ordinary anti-radiation glasses can only filter ultraviolet rays and certain electromagnetic radiation, but not blue light. Special anti-blue glasses can not only effectively isolate ultraviolet rays and radiation, but also filter blue light, which is suitable for watching computers or televisions, and can greatly reduce the irritation of blue light to eyes, eliminate discomfort symptoms such as eye acidity, fever or pain, and relieve eye fatigue.