subject: Methods to Protect Eyes against Sunshine [print this page] People focus on avoiding skin exposure to sunlight, but there are few people who will protect their eyes from the sun. In practice, researches indicate that eyes exposure to ultraviolet radiation will do injury and even cause diseases to eyes. Thereupon, we couldn't neglect the harm to eyes caused by sun.
Never look into the bright sunlight in summer. Eye is likely to get hurt because it is delicate. looking directly at the sun for a short period will cause temporary blindness. While, the long-term exposure will lead to eye pain, tearing, redness and blurred vision, etc, and thus harm the retina.
It is believed eyes are the most sensitive part to the UV rays; they can absorb a broad range of wavelengths of ultraviolet rays. The ultraviolet with wavelength of 280nm is most dangerous to the cornea, which can cause UV-conjunctivitis. The 290-400nm wavelength ones are prone to hurt lens and cause cataract.
Analysis proclaims that the longer you bask in the sun every day, the more likely you will get cataract, and the rate would be one hour to 10%. So what can we do to prevent the injury?
When you are outdoors, you need to wear caps or to use umbrellas, and to wear sunglass, in order to aviod direct irradiation. It is notable that you should pay attention to the quality when you purchase sunglasses. If it is a pair of inferior glasses simply covered by a colour, contrary to the function of protection from the sun, it will lead to pupil dilatation, which is a bigger harm to our eyes.
Prepare a pair of UV-cut eyeglasses for summer use, and you will benefit a lot. Medical studies have shown that sunglasses with a neutral coloured lenses and gray lenses are the best choices, if the colour of the lenses is too dark, they will absorb more UV. People wearing contact lenses can buy UV-protective ones which are able to block 90% ultraviolet radiation. If people put on another pair of sunglasses, then the level of security will be higher.
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.
