Glasses are an optical instrument,vision correction. They consist of a frame and spectacle lenses. When asking how to choose the right glasses, it is necessary to take into account many factors, including not only the parameters of the lenses themselves, but also how suitable the glasses are for the shape of the face. It is this that determines whether they will be comfortable to wear and whether the eyes will get tired. How can you choose the right glasses for yourself, focusing on such parameters as the material and characteristics of the spectacle lenses, face shape, hair color? It is worth noting that it is necessary to choose not only the shape, but also the color of the frame and lenses.

Glass or plastic - which is better?

First of all, glasses are intended forvision correction, eye protection from bright light, so when choosing, you need 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;
• refractive index is one ofmain indicators of the lens class, it changes 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 indicator 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?We pay attention to the nose pads, which should be soft, flexible, and not cause fatigue. The temples should not exert strong pressure on the area behind the ear and temples. The frame should be comfortable and not slip. Cheap frames often cause irritation, fatigue, headaches. Therefore, do not try to save on glasses, as this can ultimately lead to unpleasant consequences. It is better to choose the best option, combining an acceptable price and good quality.

Types of lenses for glasses

When asked how to choose the right glasses,We pay special attention to lenses. Today, manufacturers offer organic lenses made of polymer, synthetic materials with additives from plasticizers and UV absorbers. Such lenses are characterized by abrasion resistance, they are not afraid of impacts, heating. On the market today you can find Trivex and Nxt lenses, which are distinguished by the highest quality and durability. Such glasses are preferred by those who travel a lot, since it is very difficult to scratch or break them. Lenses for glasses are also produced from polycarbonate, which are lighter and more resistant to impacts. Such glasses are great for children, athletes, where safety comes first. Mineral lenses for glasses are made of traditional colorless or colored glass. Such lenses are durable, have excellent characteristics, but do not withstand impacts well, although recently special tempered glass has been increasingly produced. According to 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.

According to the position of focus, spectacle lenses are divided into:positive, which are used for farsightedness, and negative, which are prescribed for nearsightedness. Spectacle lenses are also 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 refractive indices, 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, colored and transparent, with spectral filters, polarized, with protection from UV, chemical and mechanical influences and other spectacle lenses.

Determined by the type of person

Glasses on the face cannot go unnoticed,This is a very important accessory that can completely transform your appearance. Therefore, you need to approach the choice of glasses very carefully, taking into account all factors as much as possible. Before ordering glasses, you should decide not only on the material from which the lenses are made and their type, but also on the color of your hair and the shape of your face. This determines how the glasses will look, whether they will be able to mask some flaws, emphasizing all the winning lines of the face? Before buying, study your face in the mirror, oval shapes are considered ideal, but not everyone has them. Therefore, when choosing, try to choose a shape that can hide all the flaws as much as possible, making the face attractive and bright. An oval face is considered ideal, as its proportions are even and beautiful. It is very easy to choose glasses here, rectangular, oval, square frames, aviators and droplets will do. The frame itself can be thin or massive, have various decorative details or not. A triangular face is also called a "heart", it is characterized by a narrow chin and a wide forehead. Here you can choose oval-shaped glasses with a light frame or with half rims, or without them at all. Rectangular glasses are also suitable, but with rounded edges, the width of which should be less than the height of the forehead. Massive frames overloaded with details are not suitable, as the face will simply be lost behind them. A pear-shaped face has an unusual shape of an inverted triangle. It is quite difficult to choose glasses here, but nothing is impossible! If the lower part is too wide, it is best to take rectangular frames, visually widening the face, which is too narrow at the temples. The width of the frame should be equal to the width of the jaw, which will balance the proportions. For a rectangular face shape, which is distinguished by a high forehead, a square, slightly massive chin, cat-eye frames, oval and large frames, aviators are optimal. It is better not to take rectangular, square glasses, as the face will become too large, asymmetrical. For owners of a round face, which is characterized by a rounded chin, low forehead, full cheeks, square and rectangular glasses, large and large ones, are perfect. Round glasses are not suitable, as they will only emphasize the shape of the face, make it even rounder, and attention should be diverted from this, on the contrary.

We select glasses by the color of hair

Many people mistakenly believe that the selection of glasseshas nothing to do with hair color and the main thing is to choose the frame shape, and everything else will “come by itself”. But this is fundamentally wrong: often a very beautiful frame that perfectly matches the shape of the face does not match the hair color at all, which brings an element of disharmony into the look. Therefore, when choosing, be sure to follow simple but such effective rules for choosing glasses by hair color! For owners of luxurious light hair, fair skin, light blush and light eyes, it is best to choose glasses with plastic frames in light colors: beige, light brown, peach, pink shades. Glasses in ivory, coffee with milk, or simply transparent are also suitable. You should not buy intense, bright frames of blue, green, or black colors. Metal glasses can be made to look like gold, tin or silver. If you are the owner of light brown hair, attractive gray eyes, and darkish skin, then you need to choose glasses in muted, cold colors. Greenish-marble, purple, dark red will look great. You can also choose glasses with a combined color, for example, transparent at the bottom and silvery-green, silvery-gray - at the top. Of the metal frames, silver, gold-like glasses with a slightly reddish tint are suitable. For owners of red, chestnut hair, dark eyes and dark skin, glasses with a brown, terracotta frame, plastic with a tiger pattern, amber are perfect. It is best to take metal glasses with a gold frame of any shade, copper and bronze. You should avoid cold tones, as they will stand out too much, not matching the color of the skin and hair. For brunettes who have pale porcelain skin, brown eyes, it is best to choose frames of dark, cold, saturated shades. Medium gray, pewter, blue-green, blue-black, and purple are excellent. If you choose metal frames, then preference should be given to bronze, matte gold, and copper shades. Silver metallic is also excellent, but not very bright.

General rules for the selection of glasses

Properly selected glasses can not onlydecorate its owner, but also restore excellent vision, relieve visual strain and fatigue, so the choice must be approached very seriously. We offer simple, but very effective rules for choosing glasses:

• 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 we can see, choose glasses among the widestmodern assortment is not as difficult as it seems. You just need to pay attention to such factors as hair color, face shape, so that the frame and lenses you choose not only return excellent vision, but also make your image unique and sophisticated. When choosing glasses, you should also pay attention to the type of lenses, the material they are made of, and the optical effect. If you cannot decide on your own, contact an ophthalmologist who will tell you which spectacle lenses are optimal in your case.

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