Modern bifocal glasses exclusively for beautiful ladies

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. Hence, for health sake, eyes deserve our special attention.
Please don't look up into the sun. 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 everyone knows, eyes are sensitive to bright sunlight and can absorb ultraviolet radiation of any kinds. The ultraviolet radiation with 280nm wavelength does the most damage to the cornea, and it is the cause of conjunctivitis. The UV ray of 290-400nm wavelength damages the lens badly, which is also the pathogenic factor of 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?
Wear hat or raise a parasol when you are outing. At the same time you can wear bifical eyeglasses which are also effective in protecting eyes from sunshine. It is worth notice that only quality bifical sunglasses are good to your eyes and effective in protection. 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. It has been shown in much medical research that sunglasses of neutral density glass with grey lenses are best in blocking UV rays. People wearing contact lenses can buy UV-protective ones which are able to block 90% ultraviolet radiation. If you wear progressive eyeglasses at the same time, so much the better. Don't work or do activities outside at noon because the sum at that time is strongest and prone to hurt skin as well as eyes.