Speaking of sun protection in summer, everyone would pay attention to their skin, few remember eyes. As a matter of fact, researches show that eyes are sensitive to UV rays which would do harm to eyes and cause eyes diseases. Thus, delicate eyes need our special care in heat summer days.
Never direct view sun, especially when it is strong. Eyes are more vulnerable. Short-time direct view to sun may result in transient giddiness. Long-term direct view to sunlight will cause pain, tears, inflammation and blurred vision and even hurt retina.
It is well known that eyes are the most sensitive part to the ultraviolet radiation and they can widely absorb UV rays of different wavelengths. The UV ray of 280nm wavelength damages the cornea most badly and it brings about the conjunctivitis. The UV rays with the wavelength of 290-400nm are harmful to lens, which would result in cataract. Surveys show that if you bask yourself in the sun for one more hour every day, the rate that you get cataract increase 10%.Then what should we do in preventing the harm?
When you go out in hot summer days, you must bring hat, parasol and bifocal glasses with you for sun protection use. What is noteworthy is that the quality of bifocal sunglasses is very important to the health of eyes. Poor sunglasses are not helpful in protecting your eyes; instead, they may cause a lot of problems to eyes. Buy a pair of anti-ultraviolet sunglasses when summer comes so that your eyes will be safer. Medical study has turned out that it is wrong that the darker the better in terms of lenses. Grey is a preferential choice. Those who wear contact lenses can also choose those with anti-VU code which can block 90% UV rays. It would be safer to add a pair of progressive eyeglasses. At noon, the sun is strongest and your skin and eyes are at highest risk. The best way to protect you is to keep indoors.