In summer, everyone would purchase many sun screens for skin protection, but very few of them pay attention to eye care. In fact, studies have shown that ultraviolet light can cause keratitis, cataracts, retinal damage and other eye diseases, which cannot be ignored. Thus, delicate eyes need our special care in heat summer days.
Never direct view sun, especially when it is strong. Vulnerable eyes are affected easily. If one looks at sun directly for a moment, he/she may be dizzy to watch. It is likely to get pain, tears, inflammation and blurred vision if you look at sun directly for a long time.
Actually, eyes are the most sensitive to UV, they can absorb UV with a wide range of wavelength, The UV ray of 280nm wavelength damages the cornea most badly and it brings about the conjunctivitis. The 290-400nm wavelength UV ray can cause biggest damage to the lens, which is also the reason for cataract.
Some studies have shown that if people expose to the sunlight for one more hour every day, the risk of cataracts will rises by 10%. Then what should we do in preventing the harm?
Bring a hat and umbrella to screen the sun while in the open air. At the same, wear ray ban sunglasses , which is an useful way to prevent eyes from direct irradiation. It should be noted that you’d better buy a pair of sunglasses of good quality. If the glasses are only coated with color in lens, then they will be unable to block the harmful UV; instead, they will make the pupil expand, which can cause greater damage as a result.
When summer comes, it is time for you to pick up a pair of good ray ban for sun protection purpose. Medical studies have shown that sunglasses with a neutral glass, gray lenses are the best and deep coloured sunglasses can help eyes abosorb more UV, which is obviously an unwise choice. People with contact lenses may also wear those with anti-UV function which are effective in cutting 90% UV rays. It is better if a pair of eyeglasses is counted.
The sunlight in the midday is the most sinister, not only to the skin but also to the eyes, avoiding going out is the best approach.