How to choose sunglasses
Material shall be a primary criterion in choosing sunglasses, because health is more important to the style or image. Glasses not only help protect your eyes from bright sunlight, but also do not allow UV light (only glasses with glass lenses). Just wanted to say that too small glasses (whether glass or plastic) though will look stylish, but will be a poor tool in sun protection.

Sport, recreation and sunglasses
For sports sunglasses special requirements. They not only must reliably protect your eyes from the sun, but have increased strength, to be made of special plastic, not glass, because glass increases the risk of eye injuries. According to statistics, 90% of eye injuries could be prevented if protective eyewear, with nearly half of all injuries occurring in children under 14 years.

How to choose glasses for a child?
In the first year of life, the main indications for correction are aphakia and high myopia. In children under the age of three leading indications for correction of hyperopia is for esotropia. Preschool children (3-7 years) to correct aphakia, congenital myopia and hyperopia are added early acquired myopia and astigmatism. At school age, the leading indication for the correction of myopia is acquired.

How to pick the right rims of the glasses?
New Year - the right moment to change the old, familiar, or start something new. For example, you can radically revise its image, or even just thinking about it. Think we'll start with the principal, and most importantly to us, loved ones, of course, the eyes, and everything associated with them.

What you need to remember when choosing a frame for glasses?
Participation points is a fairly serious procedure. Many people, especially women, are choosing to purchase the frames as a costume or decorations. The frame should be modern, "trendy" and yet have to face, color and styling your hair, and jewelry.

Improving appearance points lenses
Vysokoprelomlyayuschie lenses made of organic materials can significantly improve the appearance of spectacles. Using the lenses of materials with refractive indices from 1.60 to 1.74 can substantially reduce the thickness and weight of lenses and glasses to make a superficially more attractive, even at high degrees of ametropia. Variety vysokoprelomlyayuschih range of lenses in combination with optical coatings, which offer today, many manufacturers, often puts consumers in a quandary: what lens to choose? To make the right decision, we must understand the basic characteristics and features of the lens material with high and superhigh refractive index.

Contact lenses
It is believed that the eyes of the lens blush, "dried" lacrimal gland, eyes acquire a specific shine (not the greedy, not that ravenous), triggered by a myriad of diseases and so on. I wear lenses for more than 4 years. With regard to shine in the eyes and other cosmetic effects of the MCL, then I am with my close friends spent the experiment: one in the eye lens, the other without.

Spectral points or more on computer vision syndrome
American Association of optometric studies published data on the new occupational disease "Computer vision syndrome" - (KSZ). Computer vision syndrome in one form or another is observed in 100% of computer users. His symptoms are familiar to almost everyone who holds the monitor more than 4-5 hours a day. Ophthalmologists note the rapid growth of cases of SGC. For example, in North America with typical complaints of the SGC to the doctors turned to 1992, 10 million people. In 1996 - 15 million people., And in 1998 for 22 million people.

Polarizing eyeglasses. What do they differ from ordinary sunglasses?
Although the cost of those and other quite comparable, but the fishing is desirable polarized glasses. How to check whether the data points polarizing? Very simple. Take two pair, and lean their glasses to each other. You will be able to see through them. I now turn to some points by 90 degrees. If you continue to see through the glass, then the conventional glasses, but if you do not see - that's all right - you are in the hands of polarized eyeglasses. What it does affect fishing?

Sunglasses - Accessory enigma
The bright sun is often the cause of the appearance of wrinkles. On clear summer days, it is impossible to watch without squinting his eyes, especially if it is near sea. Sunlight reflected by water, shine in mercy. The only salvation in the hot, cloudless days are the sunglasses.

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Computer and visual defects 

In the 80-ies, when personal computers just began to be widely used, the main problem was a powerful radiation. The first monitors splashed out a barrage of X-rays, electromagnetic fields of low and high frequencies. Then on safety of users of speech does not even passed since computer makers have just started to think about how to protect the consumer. 

And while they did research, thousands of people around the world daily subjected themselves to high levels of radiation. And first suffered vision - the eyes are so tired and from radiation, and from low-quality images that many workers in two or three months have been complaining of vision problems. It was then that ophthalmologists have developed special glasses for working on the computer - Lenses were covered with a thin layer of metal, allowing a little to reduce the amount of radiation entering the eye. Unfortunately full protection of these points are not given. 

Today monitors are no longer such a danger - producers managed to solve the problem of electromagnetic radiation. More that, empirically proven that modern computers are no more dangerous than television. Measurements have shown that even normal Electric cables placed around the desktop, gives more radiation than the monitor. Nevertheless, people continue to believe that computer sunglasses are vitally important. Is this true? And what points are needed to work with PC? 

First, whatever the coating on the lenses, it still does not protect the eyes from the electromagnetic field. The fact that the lens have limited size, so can not eliminate the phenomenon of diffraction, ie, the waves bend around obstacles. Other words, the electromagnetic field is still encircles the lens and passes through the eyeballs. 

Secondly, modern monitors do not emit electromagnetic fields, and the rays of the visible spectrum. For the eyes violet-blue region rays, ie, short-wave, is the most exhausting. Daily many hours sitting at a computer causes the development of eye diseases because of continuous exposure violet rays and blue light, because they are closer to ultraviolet spectrum. 

Thirdly, the violet-blue rays do not reach the retina in full - they are mostly just scattered in the air. In pupil fully refracted rays of long wavelength, ie, yellow and green. As a result of this uneven picture, focusing on the retina, partially loses its clarity. Ideally, if the violet-blue part of the spectrum in some way, such using the same points, remove from the path of light flux from the monitor to eye, then it will increase clarity and reduce eye fatigue by reducing the dispersion of light. At the same time eliminating the violet and blue visible radiation would deprive image color, and this again increases the strain on the eyes. Therefore necessary that points missed at least some, but the safe part of the violet-blue region of the spectrum. 

Fourthly, the Computer glasses must pass the maximum amount of red rays of the spectrum. Research famous ophthalmologist Svyatoslav Fyodorov has shown that it is the red light increases the rate of metabolism in tissues of the eye, promotes active recovery of eye cells. To a large extent this is true of the cells responsible for photosensitivity. 

Fifthly, if the glasses have the function of the absorption of ultraviolet radiation, they will be effective only in the bright sunlight or fluorescent lamps. When working in the dim light they are nearly useless. 

Given all these subtleties, ophthalmologists concluded: computer glasses still needed, but not for the protection electromagnetic radiation, which does not bring any harm, and to reduce the pressure on the eye, especially if there are defects of vision.