Special attention should be paid to protect the eyes. Intense exposure to sunlight can cause burns eyelids, conjunctiva (conjunctiva) and the cornea, which heat can dry, crack, flake and very hurt.
The eye is cramped and can not be opened. Such a situation, fortunately, with bed rest and dripping drops, going for a day or two. Well, the sun’s rays can irreversibly damage the inside of the eye, the lens and the eye background. We are not aware because of damage in the depths of the eye does not hurt. The consequences can be a lens opacity (cataract) and deterioration of visual cells in the eye background, which is permanent. It is therefore necessary to protect the sun eye sunglasses. The only condition is that they must meet is that “glass” have a filter that does not allow penetration of damaging UV light (400 nm wavelength). All the rest is a question of choice, taste and material opportunities.
Today there are different materials of which are ground “Glass”: she may be right, so-called. mineral or plastic lens. Sometimes the fear of plastic was justified, but today is plastic so that there is no quality difference compared to glass. The advantages are that it is light weight and damaged, and the broken to burst into tiny pieces like glass. Dimming can be, if necessary, 25-75%, coloring a variety of colors, with or without a prescription. From the color, the eye is most comfortable gray (pure black, smoky gray, brown, gray, green blue). There are also glass that does not change the exterior color, and are suitable for commuters.
Children sunglasses do not follow fashion. And these are the specs required, the same as for adults, with a protective UV filter. Do children buy glasses “on the land”, plastic and dark, and without a filter, it will be due to fading of their pupils expand to catch more light and thus directly open the door for harmful rays of the sun, where we have a false sense of security. When buying sunglasses it is necessary to seek a declaration in which the manufacturer specifies the characteristics of glass and guarantees a quality product.
CONSEQUENCES OF EXCESSIVE EXPOSURE TO THE SUN EYE only manifested FOR MANY YEARS, SO WE NEED TO THINK IN THE EYES ALWAYS.