How much is the effect against the blue glasses 
 
 
Our reporter Yi Xiaofeng The correspondent Li Huayan 
 
 
China's traditional Chinese medicine to 

    Recently, the blue glasses has emerged in the consumer, and this glasses market variety, good and evil people mixed up, make public, don't know what do you want to wear? The blue light effect is good? Visual science laboratory, university of Newcastle Australia, a visiting fellow, heilongjiang daqing oil field general hospital ophthalmology Dr Zeng guang answering questions.
 
    Zeng said that human rely on the fundus (retina) photographic vision, laboratory experiments on animals and isolated cell studies show that more light will cause retinal cell damage, and filtration after blue light may reduce the damage of retinal cells. These experiments supported by optical theory. From the infrared, red, green, and blue to ultraviolet light, shorter wavelength, the shorter the light energy is higher, the shortwave blu-ray is between 400 ~ 400 nm wavelength has a relatively high energy light, so in theory, excess of blue light can damage the eye the most sensitive part of the macular.
 
    The birth of zeng guang, points out that the blue glasses, it is the application of the optical principle. But in daily life, into the eyes of the blue light, and more to the point of cause macular degeneration? Have a scientific and objective test evidence against the blue glasses to protect his eyes macular is effective?
 
    The blue glasses effective lack of evidence
 
    Zeng guang, scientists at the university of Kansas summarizes the results from all over the world for nearly 30 years, points out that there is not enough evidence to prove that the blu-ray in human trials have obvious relationship with macular degeneration and uv light, no human trials evidence against the blue glasses are helpful to macular degeneration.
 
    The latest another large study found that wearing filtration blu-ray and uv glasses for retinitis pigmentosa patients without delay the disease. Experts at the university of Sao Paulo, Brazil, after 5 years observation, found that cataract surgery using the blu-ray intraocular lens (in the eyes of the blu-ray glasses) of the patients, compared with using ordinary artificial crystal patients, there were no significant differences in the incidence of a disease of macular disease. Slovenia's doctor also got the same results. So the environment of everyday life blu-ray did not reach the level of damage effects on fundus.
 
    Backup protection mechanism can avoid the light damage to the human eye
 
    "In fact, the human body is super smart, our own eyes the corresponding protective mechanism, can avoid the light damage." Zeng pointed out that: first of all, the human eye pupil, it just like the iris of the camera to adjust how much into the light in the eye, pupil size, when the light is too strong to enter the eye light is greatly reduced, through this adjustment, reduce intraocular harmful light to the scope of the security. Secondly, fundus macular rich in carotenoids lutein and zeaxanthin can absorb filter blue light.
 
    Zeng guang, explained that lutein is a corn, vegetables, fruits, flowers, such as a major component of plant pigments, and zeaxanthin widely exists in green leafy vegetables, flowers, fruits, berries and yellow corn. The two substances is also the main pigments of retina macular area. Asians pigment density is much higher than white men. The eye itself is this protective mechanism, therefore, to protect eyes from the harmful effects of light.
 
    Do not need to wear the blue glasses everyday environment
 
    In fact, all wavelengths of light too strong will has damage to the eyes, such as a strong infrared can cause cataracts, UV and UV light is higher than the blue energy, harm more light. Zeng guang, points out that the current glasses market simply emphasize the blu-ray, mainly because it is a new concept, consumers are more likely to pay for it. I wear the blue glasses at the same time, due to filter the blue light, reducing the off color, also makes the wearer feel eyes see things clear, comfortable.
 
    Zeng's view is that in daily life, the intensity of the blue light is low, its strength is not enough to to retinal damage, it does not need special wearing blue glasses, unless it is in the case of strong light, or work in the special environment. In addition, the blue light is after the filter, the secretion of melatonin also interferes with the human body, and confuse the body's circadian rhythms, influence people's sleep.
 
 
 
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