Nowadays, people all attach great importance to skin protection, but only few people would pay close attention to eyes. Actually, researches have showed that UV is among the factors that lead to the occurance of eye diseases, such as keratitis, cataracts, retinal damage. Thus, its harm to eyes is far from being neglected. For that reason, we ought to care our eyes especially in hot summer.
Never look into the bright sunlight in summer. Eyes are extremely weak. A short-time looking straightly at the sun will result in transient darkness in front of your eyes. If one looks at the sun for longer time, his/her eyes will be badly hurt and he/she may feel faint.
Actually, eyes are the most sensitive to UV, they can absorb UV with a wide range of wavelength, The UV rays with the wavelength of 280nm are most harmful to the cornea, which would result in conjunctivitis. Wavelength of 290~400 Nm UV can harm the lens, which is the pathogenic factor for cataracts.
Research suggests that one more hour you bask in the sun every day; you are likely to get cataract with 10% more chance. So, what can we do to prevent these eye disease at usual?
Wear a set of hat or employ a parasol when you go outside. Meanwhile you can wear a pair of bifocal eyeglasses which prevents direct sunlight to eyes. It is notable that you should pay attention to the quality when you purchase sunglasses. If the sunglasses are just with tinted lenses but in poor quality, so far from protecting, they will injury eyes.
You should choose a pair of bifocal glasses which can protect yourself from the ultraviolet ray in spring and summer. Medical studies show that sunglasses with grey lenses are more effective than that of other colors; too dark ones may also harm one’s eyes. If you wear contact lenses, you can choose those with anti-UV function which can block 90% ultraviolet rays. It is better if a pair of bifocal lens is counted.
It would be good for your skin and eyes to stay in the shade as possible when the sun is strong at noon.
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