People think of sun protection as skin protection, seldom have eye protection in mind. As a matter of fact, researches show that eyes are sensitive to UV rays which would do harm to eyes and cause eyes diseases. Hence, for health sake, eyes deserve our special attention.
Don't look directly to the sunlight in the hot sunny days.Eyes are very fragile. If one looks at sun directly for a moment, he/she may be dizzy to watch. Direct view to sun for a long time may bring about damage to eye and retina, accompanied with pain, tears, inflammation and blurred vision.
As is well known, eye is a delicate tissue that is sensitive to UV rays. It can absorb UV rays with various wavelengths. The UV rays with the wavelength of 280nm are most harmful to the cornea, which would result in conjunctivitis. The UV ray of 290-400nm wavelength damages the lens badly, which is also the pathogenic factor of 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%.So what can we do to prevent the injury?
When you are outgoing in summer, remember to wear broad-brimmed hat or use umbrella, a pair bifical eyeglasses is most effective in protecting your eyes. What is noteworthy is that the quality of bifical sunglasses is very important to the health of eyes. Inferior sunglasses will hurt your eyes rather than protecting eyes. They may cause mydriasis. Buy a pair of anti-ultraviolet sunglasses when summer comes so that your eyes will be safer. Medical studies have certified that lenses in grey are best as grey have little influence on the effect of vision but effective in anti-UV. People wearing contact lenses can buy UV-protective ones which are able to block 90% ultraviolet radiation. It will be better to wear a pair of progressive eyewear.You'd better not go outside at noon when the sun is strong and are likely to threat the security of skin and eyes.