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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Means for care of contact lenses

Contact lenses should be thoroughly cleaned and disinfected with the help of special tools that can be purchased at any salon optics or the relevant department of pharmacy. To date, the most effective are the multifunctional peroxide solutions. There are several types means for the purification and storage of lenses: buffers, preservatives, tonicity solutions, moisturizing, lubricating substances. 

Buffers are the salt needed to maintain a stable pH-level solution. For human tears eyeglasses considered normal pH = 7,0-7,4, ie, neutral environment. Comfortable eye feels a somewhat wider range
- PH = 6,6-7,8. If you use solutions, pH-rate which exceeds these limits, the wearing of lenses will be accompanied by burning sensation. 

Preservatives are disinfectants that are intended to prevent multiplication microorganisms in the solution. In other words, they have a bactericidal value. All solutions are available in sealed vials 
that ensures their sterility, but after the opening of a bubble in the liquid from the air get all sorts of bacteria. Besides, preservatives also destroy microorganisms trapped on the surface of the lens. 

Funds supporting tonicity of the solution, "responsible" for their content of sodium chloride. Norm tonicity assumed salt content in the intercellular fluid, namely 0,9%. If the tonicity of the solution more than 0,9%, he is hypertensive. Such solution "sucks" water from the lens, causing them to shrink and deform, and this causes unpleasant sensations in the eyes. For care for contact lenses must be used hypotonic solution containing sodium chloride less than 0.9% because they violate the power of the lens to the absorption of liquid. 

Contact lenses not only improve vision, but also control the moisture content on the surface of the eyeball. Violation normal moisture causes extreme discomfort, and lenses can aggravate it. Therefore, the solutions for the withdrawal them added moisturizing substances that promote more rapid and uniform distribution of solution on the surface contact lenses. The most common humidifier use polysorbate-80 or polyvinyl alcohol. 

To prolong the life of the lenses in the chemical composition of the solutions include a lubricant. Examples of lubricants can serve hydroxypropylmethylcellulose. To enhance the actions of all preservatives and disinfectants present in the solution, it also added chelating agents. Because of its chemical activity, they increase the effectiveness of drugs due to destruction of the walls in 
cells of microorganisms.