Corrective glasses - what is it? Corrective glasses: General characteristics, description, variants, photos

Blurred vision has become a common phenomenon today. However, there are optical devices that allow to solve this problem. To see how a healthy person, help glasses corrective. What is it? This is a special product used in refraction and accommodation.

The Risk of purchasing substandard products

Today, optical devices for vision correction are sold almost everywhere. They can be purchased even in the subways. But should you trust their quality? Many people have never seen such an ophthalmic product, such as corrective glasses. What it is, they do not know. Faced with the need to buy these products, they make mistakes. In the end they have to face negative consequences:

• The person begins to experience fatigue in the eyes, and the sight continued to deteriorate;
• Low-quality rim irritate the skin, leading to allergic reactions;
• The glasses look inharmonious, because their owner did not attach importance to the appearance of the products.

What to look for?

When Choosing sunglasses corrective what it is - it is necessary to know necessarily. This eye care product, then buying it should be treated with responsibility. You need to buy it in the salons of optics. The main part of the product is setting. We can distinguish several types of it:

• One-piece. She frames lenses completely.
• Semi-rimless. Only has the upper edge. It is a fixed lens. Glass is free from the bottom.
• Bezobidnaya. Devoid of edges. The arms are connected directly with glass. These frames corrective eyeglasses contain the element that binds them.

The quality of materials used metal and polymers. Eyeglasses, made from acetate, can be considered a sort of novelty.

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If you want to become owner of high-quality products, be sure to see the specifications. The documents indicated GOST R 51193-98. There are unscrupulous firms that are creating sunglasses corrective what it is, do not understand. They should be made in accordance with the legal regulations. They regulate the General technical conditions.

The Standards are used to determine whether the goods for the correction of vision medical requirements. Optical instruments, created in a controlled environment, pose a risk to human health. But made in accordance with all GOST requirements corrective glasses, you can buy safely.

What lenses are preferable?

For the production of corrective eyeglasses use mineral glass and organic materials. In the first case is a transparent substance. It is formed after a strong pre-cooling the melted glass-forming components. The resulting lenses are quite heavy, but excellent resist mechanical stress. Plastic products, on the contrary, weigh little. But such glasses require the application of the additional coating to avoid scratching.

The Approach of the Russian and foreign companies

Domestic manufacturers successfully mastered the manufacture of corrective glasses by the method of the tint. They use a variety of substances that have sunscreen properties. You can often see the products of gray and brown. However, the market is flooded and saturated colors: green, blue, yellow. Americans prefer the gray glass, and the Europeans — brown.

Russian companies are prone to arbitrary choice of color. Abroad, by contrast, seek to take into account the lifestyles of customers. The representatives of creative professions offer sunglasses with grey lenses. Products reduce the contrast of green and blue and make the blue less intense. Brown glass, it is desirable to assign drivers and even people spending a lot of time on the road. If to the patient it is important to maintain colour quality and to increase contrast at the same time, it requires lenses green tint. It is the representatives of professions such as racers, shooters, golfers.

It is believed that glasses with yellow lenses have a distinctive sporty look. But experts recommend them only to people involved in tennis. They improve the orientation of the player on the court.

If you are prescribed corrective glasses, reviews need to learn sure - they tell you many useful things. Comments can vary, because here, as in the case of drugs, it all depends on the individual patient and the manufacturer of the products.

Important

If your eyesight varies from 0.5 to 0.05, the required telescopic glasses. They are effective with of ametropia, while perfectly increase the size of the items. In products there is one negative and positive lens.

Prismatic glasses are designed for patients suffering from pathology of the eye muscles. Two prisms present in them, and refract the rays at an angle of 90 degrees. Due to this, a person can put a book on his chest and in a position to see what is written in it.Such optics provides invaluable support to the sick bed.

In some cases, the ophthalmologist prescribe corrective glasses mirror. What is it? They have reflective properties, are used in people with unilateral hemianopsia.

Experts always write a prescription for corrective eyewear, which contains custom settings:

• The distance separating the optical centers of the lenses from each other;
• The above percentage for both eyes;
• The optimum displacement of the centre;
• The purpose of the optics.

To determine the optical power, using the device — tiptimer. It is present in all ophthalmic offices. It is necessary to visit an eye doctor to stop the disease in its early stages.

Certain models of corrective glasses need getting used to, while others are unassuming character. Difficulties usually arise with the optics, allowing to solve specific problems such as astigmatism, for example. That's why sometimes even products chosen by professionals, have side effects. They have to get used gradually.

Now in stores are made corrective glasses, a photo of which I propose to see right there on the spot. Sometimes their optical capabilities exceed the allowable. With them should be careful. Customers sometimes order ophthalmic optics in advance.

Doctors recommend to carry separate models of corrective glasses on a regular basis. It is better to use them from time to time, say when you sit behind the wheel. You can wear them when working with parts with a small size.

Product Selection in accordance with the type of person

So, the theoretical part is studied, it is now possible to consider the creation points to a harmonious way. They should not push their views from their owner. Of course, you are free to choose the form of the product. But we should not forget about a few rules that are considered basic.

1. Non - and semi-rimless eyeglasses are not recommended for holders of an elongated face type. So people better buy glasses medium size.
2. Products having high land, good for owners of high forehead.
3. Points with a low rise will be an excellent look at the people with large nose. You can use the massive frame of dark shade. Well to apply more and double jumper. The same advice can be given to people with a large chin. If all facial features in humans are proportional, allowed the use of points of any shape.

Select by color

People with light hair are suitable correcting spectacles with a frame of silver or gold color. Bronze color looks great for the owners of red hair, while the brown-haired can recommend the brown, Golden or red. The brunettes, on the contrary, you need to consider black.

Selecting in accordance with a wardrobe

Strict glasses go perfectly with a business suit. Brighter solutions recommended for street style. They are popular among the younger generation. Such products are often among the optics with a polymer frame.