So let’s just take a quick look at what blue light is.
Short-wave blue light is relatively high-energy light with a wavelength between 400nm and 480nm. The blue light in this wavelength will increase the amount of toxin in the macular area of the eye, seriously threatening our fundus health. Blue light exists in a large number of computer monitors, fluorescent lights, mobile phones, digital products, display screens, LED and other light, the wavelength of blue light will make the eye macular area toxin increased, a serious threat to our eye health.
Blue light can be seen everywhere in daily life, but the main source of harmful blue light exposure is LED LCD screens. Today’s LCD screens are backlit by LEDS. Since backlighting requires a white light effect, the industry uses blue leds mixed with yellow phosphors to create white light. Because blue leds are the main piece of hardware, the blue spectrum of this white light has a crest, creating the problem of what we call harmful blue light that hurts the eyes.
One, the true role of anti blue light lens:
For those who spend a lot of time using computers or electronic displays, it is now certain that blue-blocking lenses can block some of the harmful blue light from the eyes, making it more comfortable to work in front of a computer screen. However, there is no further evidence to prove that it can effectively improve the effect of sour eye swelling, dry eye, vision loss, fundus lesions and so on. So be wary of marketing claims that are exaggerated.
Two, the details need to pay attention to in the test:
1. Parameters are mainly used in the near future
As the glasses are mainly used recently, optometry prescriptions should take this into full consideration and appropriately reduce the corrected visual acuity during optometry, so as to avoid eye discomfort caused by a long time of near use. The specific optometry prescription must be obtained by a professional optometrist after rigorous optometry.
2. Qualified optical lenses
1, anti blue light lenses must first be qualified optical lenses, and must have a certain percentage of anti blue light effect, general anti blue light optical lenses about 30%. Not all blue light is harmful. About 30 percent of blue light is considered harmful, and the rest is beneficial. It is recommended to choose lenses produced by big brand lens manufacturers.
Secondly, there are two main types of anti-blue lenses. One is light orange lenses with tinted substrates, such as GUNNAR, which have a dark background and are not suitable for prolonged wear. Flat lens is the main lens. The other is realized through the surface film layer, the background color is lighter, there is also a little light orange, it is easier to see under the white background. From the point of view of the effect, there is little difference between the blue light protection effect of the two kinds of lenses. But the latter are more technologically advanced and generally superior in optical performance.
In addition, even people who are not myopic, it is best to choose the brand lenses of reliable optical lens manufacturers. It is better to make the lens separately for carefully selecting the finished product of zero degree glasses. The quality of the lens is an important key to ensure the comfort and effect of wearing.
3. Treat market noise with caution
Those who claim to have the function of “eye protection” and those who boast about the magical effect of their anti-blue light products are suspected of deceptive marketing. Those who use a large number of pictures to threaten the harm of blue light are obviously suspected of threatening marketing to magnify the harm of blue light. Avoid talking about the lens manufacturer or the lens from the industry is not known, do not try. Marketing only requires thick skin and dare to brag, but professional lens factories need more than ten years or even decades of accumulation, do not be blinded by dazzling pictures and brand image. At present, no eyewear retailer in the world has the ability to develop professional lenses. Most of the biggest reasons they launch their own brands are because they don’t want customers to compare prices.
Post time: Nov-17-2021