Why People Need to Wear Anti-blue Light Glasses?

Nowadays, electronic products are very popular in our daily life. Most people like to read news on computer, go shopping online or watch TV & films on cell phone. We know that some electronic products such as computers, cell phones and televisions have radiation and are bad for our eyes when using them. We all know that many old people have to wear reading glasses due to bad eyesight. Therefore, more and more people begin to realize the importance of protecting eyes. How to do when using electronic products? Wearing anti-blue light glasses is a good way for men and children. Here we will introduce its functions.

1. Reduce the blue light

The main function of anti-blue ray eyeglasses is to reduce blue light produced by electronic products and achieve the purpose of protecting eyes of people. Usually the blue light of electronic products is a light with 430-480nm wavelength, which is shorter than most other visible lights. We know that the shorter the wavelength is, the higher the energy is. So the energy of blue light is relatively high.

Now many electronic products with screens use the blue LED chip to cover a layer of light yellow phosphor (YAG) to produce white light. In the production technology of white light LEDs, blue light is the primary light source generated for the first time after the chip is powered on, and yellow light is the secondary light source generated by the blue light. So the blue light has the highest energy among all visible lights produced by the current electronic screens.

2. Relieve eye fatigue and reduce retinal damage

Generally the higher the energy of the light is, the greater the side effect on the eyes is. The blue light with high energy has strong penetrating power, which can penetrate directly the retina of the eye through the cornea, lens and vitreous body. If the irradiation time is not too long, the influence of the blue light energy on the cells of retina is limited, because the cornea, lens and vitreous body have a certain filtering function for blue light as well. If people stare at the screen of electronic products for long time without the help of blue light filter eyeglasses, the blue light will damage the photo sensory cells and epithelial cells of the retina.

For above reason, when people wear the anti-blue light glasses to use electronic products, the blue light blocking lens can block part blue light to avoid hurting the cells of the retina and reduce effectively the irreversible light damage of eyes, especially for the people who play with mobile phone and computer for a long time.

3. Anti-radiation and anti-ultraviolet ray function

What is more, the anti-blue light glasses can be used as anti-radiation glasses, since it can prevent ultraviolet rays and filter out other messy waves. Suppose that the blue light attenuation rate for electronic products is 65%, it not only has anti-blue light effect, but also can filter out 99% ultraviolet ray which wavelength is less than 400nm.