Points are an optical device,corrective vision. They consist of frames and spectacle lenses. When the question of how to choose the correct glasses, it is necessary to take into account many factors, among which not only the indicators of the lenses themselves, but also how much the glasses are suitable for the shape of the face. It depends on this, whether they will comfortably be worn, whether or not the eyes will be tired. How can you choose the right glasses for yourself, focusing on such indicators as the material and characteristics of spectacle lenses, the shape of the face, the color of your hair? It is worth noting that it is correct to select not only the shape, but also the color of the frame, lenses.

Glass or plastic - which is better?

In the first place, glasses are designed foreye correction from bright light, so when choosing to pay attention to the characteristics of spectacle lenses. In order to choose them correctly, you need to know the following points:

• optical indicators (diopters, intercentredistance). In order to know such values, it is necessary to undergo a medical examination. Only after a complete, competent examination of the ophthalmologist will give a prescription for glasses, and then you can be sure that the purchase will benefit, not harm. Improperly selected glasses can greatly impair vision;
• The refractive index is one of the mainof the lens class, it varies depending on the material of manufacture. This indicator fluctuates, in practice it means how much your face will be distorted. A higher index gives less distortion, these are lenses with an index of 1.6;
• material of manufacture. Today, spectacle lenses are made of plastic, characterized by low weight, resistance to splitting, less thickness, the ability to take a variety of shades. They are made of traditional glass. The strength of glass lenses is higher (except for the shock), they can be made more flat;
• antireflex coating, improving optical properties, which allows to increase the transparency of glasses by 8-10 percent. These glasses allow you to see better at the wheel, it is more comfortable to work at the computer.

How to choose a frame? Attention is drawn to nosoupory, which must be soft, mobile, not to cause fatigue. The temples should not exert strong pressure on the area behind the ear and whiskey. The frame should be comfortable, not slip. Cheap rims often cause irritation, fatigue, headaches. So do not try to save on the glasses, in the end it can lead to unpleasant consequences. Better choose the best option, combining an acceptable price and good quality.

Types of lenses for glasses

At the question of how to choose the correct glasses, specialattention is paid to lenses. Today, manufacturers offer organic lenses, which are made of polymer, synthetic materials with additives from plasticizers and UV absorbers. Such lenses are abrasion-resistant, they are not afraid of blows, heating. On the market today you can find lenses Trivex and Nxt, which are characterized by the highest quality and durability. These glasses are preferred by those who travel a lot, because scratching them or breaking it is very difficult. Lenses are produced for glasses and polycarbonate, which have less weight, greater resistance to shocks. Such glasses are great for children, sportsmen, where safety comes first. Mineral lenses for glasses are made from traditional colorless or colored glass. Such lenses are strong, they have excellent characteristics, but they do not withstand blows, although in recent years special tempered glasses have been increasingly produced. By optical action glasses can be divided into:

• afocal, not having optical power. Such lenses are used for sunglasses. They are divided into prismatic, non-prismatic, and deiconic lenses;
• astigmatic, which have one toric surface and one spherical;
• Stigmatic lenses with the same refraction in each meridian section.

By the position of focus, the lens lenses are divided intopositive, which are used for farsightedness, and negative, which are prescribed for myopia. Lenses for glasses are distinguished by the number of optical zones:

• multifocal, used to improveclarity of vision of surrounding objects (these are progressive for correction of senile farsightedness, fourfocal with a gradual change in refraction, trifocal, bifocal, variofocal with smoothly changing transitions, transfocal);
• single-focal with one optical zone.

According to the refractive indices, the lenses are divided into:

• super-refractive index with the index from 1.74;
• high refractive index, from 1.59;
• with an average value of 1.52-1.59;
• traditional, 1.5-1.52.

Depending on the coating, all spectacle lenses can be divided into:

• antireflective with several layers of inorganic compounds. They reduce the reflection of light, increase light transmission;
• with a mirror coating that is created on the basis of metal oxides, which have a refractive index of 10 to 50 percent. There may be different colors: yellow, green, blue, pink;
• multifunctional. They have dirt-repellent, antireflective properties;
• hardening. They are resistant to scratches, chips, often have a special layer on the surface;
• water-, dirt-repellent lenses.

There are also photochromic, color and transparent, with spectral filters, polarizing, UV-protected, from chemical and mechanical influences and other spectacle lenses.

Determined by the type of person

Glasses on the face can not go unnoticed, it'sa very important accessory that can completely transform the appearance. Therefore, it is necessary to approach the selection of glasses very carefully, taking into account all factors as much as possible. Before you order glasses, it is necessary to determine not only the material of making lenses and their type, but also with the color of their hair, the shape of their face. It depends on it, how will the glasses look, will they be able to disguise some shortcomings, highlighting all the winning lines of the face? Before buying, study your face in the mirror, oval shapes are considered ideal, but not all are found. Therefore, when selecting, try to find a form that can hide all the shortcomings as much as possible, making the face attractive and bright. The oval face is considered ideal, as its proportions are even and beautiful. Points to choose here is very simple, rectangular, oval, square frames, aviators and droplets will fit. The frame itself can be thin or massive, have different decorative details or not. Triangular face is also called "heart", it is characterized by a narrow chin and a broad forehead. Here you can choose oval-shaped glasses with a light frame or with half rims, without them at all. Suitable and rectangular glasses, but with rounded edges, the width of which should be less than the height of the forehead. Massive, overloaded with detail frames can not be used, because their face is simply lost. A pear-shaped face has an unusual shape of an inverted triangle. Pick up points here is quite difficult, but nothing is impossible! At too wide a bottom part it is better to take rectangular frames, visually expanding the face, which is too narrow in temples. The width of the frame should at the same time be equal to the width of the jaw, which will allow you to balance the proportions. With a rectangular shape of the face, which is distinguished by a high forehead, a square, slightly massive chin, the "cat's eye" frames, oval and large frames, aviators are optimal. Rectangular, square glasses are best not to take, because the face will become too large, asymmetric. For the owners of the round face, which is characterized by a round chin, low forehead, full cheeks, square and rectangular shaped glasses are great, large and large. Round glasses are not suitable, since they only emphasize the shape of the face, make it even rounder, and from this attention, on the contrary, must be distracted.

We select glasses by the color of hair

Many mistakenly believe that the selection of glasses in no wayis not associated with the color of hair and the main thing is to choose the shape of the frame, and everything else "will come itself". But this is fundamentally wrong: often a very beautiful frame, which fits perfectly to the shape of the face, is not at all combined with the color of the hair, which introduces an element of disharmony. Therefore, when choosing, be sure to follow simple, but such effective rules for choosing glasses for the color of hair! For owners of luxurious light hair, light skin, light blush and light eyes, it is best to choose glasses with plastic frames of a light range: beige, light brown, peach, pink shades. Also fit glasses of ivory, coffee with milk, just transparent. Do not buy intense, bright frames of blue, green, black. Metal glasses can be made for gold, tin or silver. If you are the owner of blonde hair, attractive gray eyes, dark skin, then you need to pick up glasses in a muffled, cold scales. Excellent will look greenish-marble, purple, dark red. You can choose glasses and with a combined color, for example, transparent at the bottom and silvery-green, silver-gray - at the top. Of metal frames silver glasses are suitable, for gold with a slightly rusty hue. For owners of red, chestnut hair, dark eyes and swarthy skin glasses with a brown frame, terracotta color, plastic with a tiger pattern, amber are perfect. Metal spectacles are best taken with a rim for gold with any shade, copper and bronze. Avoid cold tones, because they will be too much allocated, not suitable for skin color and hair. For brunettes that have pale-china skin, brown eyes, it is best to choose frames of dark, cold, saturated shades. Excellent fit moderately gray, tin, blue-green, blue-black, purple. If you select metal frames, then the preference should be given to bronze, gold matte, copper shades. Excellent and silver metallic, but not very bright.

General rules for the selection of glasses

Correctly selected glasses can not onlydecorate its owner, but also to restore excellent vision, to remove eye strain and fatigue, so the choice should be approached very seriously. We offer simple, but very effective rules for choosing points:

• pass an examination with an ophthalmologist toget a recipe. In this case, the vision will be checked on modern equipment, which will give you the opportunity to purchase exactly those lenses that suit you specifically;
• determine the type of lenses themselves (coating, the presence of a light filter);
• Determine the shape and size of the rim.

As you can see, choose glasses among the widestModern assortment is not as difficult as it seems. You just need to pay attention to factors such as hair color, the shape of the face, so that the selected frame and lenses not only returned excellent vision, but also made your image unique, refined. Attention when choosing glasses, you must pay attention to the type of lenses, the material of their manufacture, the optical effect. If you can not decide for yourself, contact an ophthalmologist who will tell you which eyeglass lenses are optimal in your case.

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