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What kind of sunglasses best protects against the sun

April 30 2007
09:00

Slightly more than 300 years ago, the prototype of today's sunglasses. Since then, sunglasses with colored lenses have won our hearts. But it's not just fashion, but also an attribute of health.

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Brown glass increases the light and shade, shade-lit area and create a feeling of fullness and depth. They are particularly suited to those who have strabismus.

Green glass does not obscure the landscape and highlight color. They are especially recommended for the elderly and suffering from glaucoma. Green relaxes the nervous system, causing a feeling of comfort. If you wear green glasses outflow of intraocular fluid is better, and the intraocular pressure is reduced.

Blue filters are best protect you from the dazzling sun, as well as infrared rays.

Red, yellow and orange filters excite the nervous system and increase the intraocular pressure, which leads to spasm and narrowing of the ways in which departs intraocular fluid. Although the yellow filters are preferable to drivers during heavy fog or at night.

For those who wear glasses all the time, best fit glasses "chameleons", fitted with photochromic lenses that react to light level: the brighter the light, the darker the points, and vice versa. But keep in mind that the glasses with plastic lenses in a few years may be "tired", that is, their ability to darken and enlightenment is reduced.

With respect to the refraction of light, the difference between glass and plastic filters do not. There is a difference only in the shelf-life score. The plastic is always faster than scratched, so these points need to be updated frequently, sometimes 2-3 times a year, because you can not scratch the glass wear. All glasses should be stored in a soft case, putting them only a glass top.

On materials "Pravda.ru"


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