In summer days, sunglasses are always playing
But sunglasses are not simply a fashion accessory to be taken lightly. They are actually of major importance for protecting our eyes from the sun's UV rays which can lead to diseases of the eye when exposed to them over time.
There are mainly two basic areas in ultra radiation element in sunlight- UVA and UVB. UVA rays can pass through the cornea and reach the lens and retina inside the eye. Overexposure to UVA radiation has been linked to the development of certain types of cataracts, and research suggests UVA rays may play a role in development of macular degeneration. In low doses, UVB radiation stimulates the production of melanin (a skin pigment), causing the skin to darken, creating a suntan. But in higher doses, UVB rays cause sunburn that increases the risk of skin cancer. UVB rays also cause skin discolorations, wrinkles and other signs of premature aging of the skin.
The amount of UV protection sunglasses provide is unrelated to the color and darkness of the lenses. A light amber-colored lens can provide the same UV protection as a dark gray lens. Your optician can verify that the lenses you choose provide 100 percent UV protection.
As a matter of fact, you need not fear the outdoors and sunny days, as long as you are equipped with the right eye and skin protection to reduce your UV exposure. You are necessary to wear a pair of good quality sunglasses to protect your eyes.