Visual impairment has become common today. However, there are optical devices that can solve this problem. Corrective glasses help to see how a healthy person is. What it is? These are special products used both in refraction and in accommodation.
The risk of acquiring low-quality products
Today, optical vision correction devices are sold almost everywhere. They can be purchased even at underground passages. But is it worth trusting their quality? Many people have never seen such an ophthalmic product as corrective glasses. What is it, they do not know. Faced with the need to buy similar products, they make mistakes. As a result, they have to face negative consequences:
- a person begins to feel tired in his eyes, and his vision continues to deteriorate;
- low-quality frames irritate the skin, leading to allergic reactions;
- glasses do not look harmonious, since their holder did not attach importance to the appearance of the products.
What to look for?
Choosing corrective glasses, what is it - you must know. This is an ophthalmic product, which means that its purchase should be treated with responsibility. You need to purchase it only in optics stores. The main component of the product is the frame. There are several types of it:
- One-piece. She frames the lenses completely.
- Half-rimless. Has only the top edge. A lens is fixed on it. Glass is free from the bottom.
- Bezelless. Deprived of the edges. The arms are connected directly to the glass. Such frames corrective glasses contain an element that holds them together.
The materials used are metal, as well as polymers. Frames made from acetate can be considered a kind of innovation.
If you want to become the owner of a quality product, be sure to see the specifications. The documents indicate GOST R 51193-98. There are unscrupulous firms that, creating corrective glasses, what it is, they completely do not understand. They should be made in accordance with legal regulations. They govern general specifications.
Standards allow you to determine whether products for vision correction meet medical requirements. Optical devices created in artisanal conditions pose a danger to human health. But the corrective glasses made in accordance with all the requirements of GOST can be bought safely.
Which lenses should I prefer?
Mineral glass and organic materials are used to produce corrective glasses. In the first case, a transparent substance takes place. It is formed after strong cooling of the pre-molten glass-forming components. The resulting lenses are quite heavy, but they withstand mechanical stresses. Plastic products, on the other hand, weigh little. But such glasses require additional coating to avoid scratching.
The approach of Russian and foreign firms
Domestic manufacturers have successfully mastered the production of corrective glasses according to the lens staining technique. They use various substances with sunscreen properties. Most often you can see products in gray and brown. However, there are more saturated colors on the market: green, blue, yellow. Americans prefer gray glasses, and Europeans prefer brown.
Russian companies are prone to arbitrary color choices. Abroad, on the contrary, seek to take into account the lifestyle of customers. Representatives of creative professions are offered glasses with gray lenses. Products reduce the contrast of green, and blue and blue make less saturated. It is advisable to assign brown glasses to drivers and people who spend a lot of time on the road. If it is important for the patient to maintain color rendering quality and increase contrast at the same time, he needs green lenses. These are representatives of professions such as motorcycle racers, shooters, golfers.
It is believed that glasses with yellow lenses have a characteristic sporty appearance. But experts recommend them only to people involved in tennis. They improve the orientation of the player on the court.
If you have been prescribed corrective glasses, you need to study the reviews - they will tell you a lot of useful things. Comments may vary, because here, as in the case of drugs, it all depends on the individual characteristics of the patient and the manufacturer of the products.
Important parameters
If vision varies from 0.5 to 0.05, telescopic glasses are required. They are effective in ametropia, while excellently increasing the size of objects. In products, there is one negative and positive lens.
Prismatic glasses are intended for patients suffering from pathology of the eye muscles. The two prisms present in them refract the rays at an angle of 90 degrees. Thanks to this, a person can put a book on his chest and in this position see what is written in it. Such optics provides indispensable support for bedridden patients.
In some cases, ophthalmologists prescribe corrective specular glasses . What it is? They have reflective properties, are used in people with unilateral hemianopsia.
Specialists always write a prescription for corrective glasses, which contains special parameters:
- the distance separating the optical centers of the lenses from each other;
- the above indicator for both eyes;
- optimal center displacement;
- purpose of optics.
To determine the optical power, a device is used - a diopter. He is present in all ophthalmology rooms. It is necessary to visit an eye doctor in a timely manner to stop the disease in the early stages.
Certain corrective glasses are addictive, while others are unpretentious. Difficulties usually arise with optics that can solve specific problems, such as astigmatism, for example. That is why sometimes even products selected by professionals give side effects. You need to get used to them gradually.
Now in the salons are made corrective glasses, photos of which they offer to see right there, on the spot. Sometimes their optical capabilities exceed permissible. You should be careful with them. Customers sometimes order ophthalmic optics in advance.
Doctors recommend refusing to wear individual models of corrective glasses on an ongoing basis. It is better to use them from time to time, for example, when you get behind the wheel. You can wear them when working with parts that are small in size.
Product selection according to face type
So, the theoretical part has been studied, now you can think about creating a harmonious image with the help of glasses. They should not repel their appearance from their owner. Of course, you yourself can choose the shape of the product. However, one should not forget about several rules that are considered basic.
- Without and semi-rimmed frames are not recommended for owners of an elongated type of face. It’s better for such people to buy medium-sized glasses.
- Products with a high landing are good for owners of a wide forehead.
- Low-rimmed glasses will look great on people with a large nose. You can use a massive frame of a dark shade. It is also good to use a double jumper. Similar advice can be given to people with a large chin. If all facial features in a person are proportional, the use of glasses of any shape is allowed.
Color selection
For people with fair hair, corrective glasses with a silver or gold rim are suitable. The bronze shade looks great among owners of red hair, while brown, golden or red can be recommended to brown hairs. Brunettes, on the contrary, need to consider black.
Wardrobe choice
Strict glasses go well with a business suit. Brighter solutions are recommended for street style. They are popular with the younger generation. Such products are often found among optics with a polymer frame.