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Prevailing bifocal glasses especially for spandy girls
joisse | 10 Avgust, 2009 03:56
The first thing that comes to mind when one thinks of sun protection is to protect skin, hardly think of protecting eyes. Instead, surveys show that ultraviolet radiation is the main cause of some eye diseases, such as keratitis, cataracts, retinal damage. So, we can't ignore the eye injury caused by ultraviolet radiation.
Don't look directly into the sun. Delicate eyes are easily hurt.Direct view to sun for a while may lead to temporary giddiness.One may suffer from pain, tears, inflammation and blurred vision if he/she looks up to sun for a long time.
As is known to all, eyes are fragile and susceptible to ultraviolet radiation which would easily injury eyes. The 280-nm wavelength UV ray does the greatest injury to the cornea. It is likely to cause conjunctivitis.The UV rays with the wavelength of 290-400nm are harmful to lens, which would result in cataract. Studies suggest one is more likely to get cataract if he/she roasts in the sun more. Then what should we do in preventing the harm?
If you stay out in the sun, you'd better make use of hat, umbrella and bifocal eyeglasses to protect your eyes from sunlight. It should be noted that you'd better buy a pair of bifocal sunglasses of good quality. Inferior sunglasses will hurt your eyes rather than protecting eyes. They may cause mydriasis. One must buy himself/herself a pair of sunglasses with anti-UV function. 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 would be safer to add a pair of progressive eyeglasses. You'd better not go outside at noon when the sun is strong and are likely to threat the security of skin and eyes.
Don't look directly into the sun. Delicate eyes are easily hurt.Direct view to sun for a while may lead to temporary giddiness.One may suffer from pain, tears, inflammation and blurred vision if he/she looks up to sun for a long time.
As is known to all, eyes are fragile and susceptible to ultraviolet radiation which would easily injury eyes. The 280-nm wavelength UV ray does the greatest injury to the cornea. It is likely to cause conjunctivitis.The UV rays with the wavelength of 290-400nm are harmful to lens, which would result in cataract. Studies suggest one is more likely to get cataract if he/she roasts in the sun more. Then what should we do in preventing the harm?
If you stay out in the sun, you'd better make use of hat, umbrella and bifocal eyeglasses to protect your eyes from sunlight. It should be noted that you'd better buy a pair of bifocal sunglasses of good quality. Inferior sunglasses will hurt your eyes rather than protecting eyes. They may cause mydriasis. One must buy himself/herself a pair of sunglasses with anti-UV function. 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 would be safer to add a pair of progressive eyeglasses. You'd better not go outside at noon when the sun is strong and are likely to threat the security of skin and eyes.
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