It’s more difficult to meet a person with perfect vision today and more complicated. Russian Ministry of Health says problems with vision affect 50% of the population. In the next 10 years, this the amount will increase to 70%. This is due to an increase in the load on eyes. Televisions, computers, mobile devices, print information negatively affects a person. Properly selected contact lenses and eyeglass lenses will help correct the situation.
- Which lenses are best for eyes and glasses?
- Advantages and disadvantages of points
- Advantages and disadvantages of contact lenses
- Which lenses are best for glasses?
- Optical performance
- Refractive index
- Materials of manufacture
- Special coatings
- What are good contact lenses for the eyes?
- Contact Lens Classification
- Lenses are also divided into categories depending on the mode:
- Depending on the characteristics of the material, there are:
- The main classification is based on the purposes of use:
Which lenses are best for eyes and glasses?
Professional vision correction is necessary in situations when deviations from normal values are observed. Even deviations are minor, correct measures should be taken. Glasses are prescribed for children from any age, and lenses from 10 years to avoid serious consequences. Adults Glasses and Lenses help relieve eye strain.
Modern technology allows you to create high-precision lenses for eyes and glasses. The following materials are used for manufacturing – glass, plastic, organics. Glasses today are not easy a tool for correcting vision, but also an accessory.
For many, glasses are the best choice, but they are not worn in every situation. They limit lateral vision, often they can not to wear due to the risk of breakage.
Advantages and disadvantages of points
a large selection of frames for men, women and children;
lenses for any situation – for work, reading, walking;
not always comfortable to wear;
side vision restriction;
glasses fog up from changes in temperature and hot steam;
Advantages and disadvantages of contact lenses
easy vision correction;
unlimited physical activity;
complexity of putting on and taking off;
risk of infection in the eyes.
For many people, contact lenses have become a great choice, allowing you to engage in physical activity and other activities. But they must be changed regularly, use special solutions and monitor hygiene. A lot of people are afraid of the procedure removing and putting on lenses.
Glass lenses are made with the addition of minerals. They are not scratched over time, used for several years. But with careless handling, they break and hit the face splinters. Because of the risk of injury, it is best to recommend them only tidy people leading a calm lifestyle. In the same time mineral lenses are more relevant for diseases, for example, high degree of myopia.
Analogs are lenses made of plastic, which are difficult to break. They light and comfortable, but appear on their surface over time scratches. Glasses with such lenses are prescribed to children or just who leads an active lifestyle.
Innovative technology products are organic lenses. They are made using polymeric materials. They are light and durable, provide correct vision correction.
Which lenses are best for glasses?
Lenses are an essential element of glasses, so their selection should be Attend. In such matters, it is best to consult with doctor, as well as focus on the characteristics:
special coatings and so on.
This allows you to get a result that meets expectations. It is better for children to pick up glasses that do not break and are not damaged. Polycarbonate is considered the best material.
To people who spend a lot of time behind the wheel or walk on air, color lenses fit. Green and brown color help to enhance contrast, and yellow muffles bright blinding Colour.
Those who have a lot of time working on a computer, it is better to choose lenses that reduce eye strain and protect against serious problems. These glasses are recommended to be worn even when visual impairment for prevention.
Important optical indicators of lenses are diopters and center distance. It’s impossible to determine on their own, therefore consult with an ophthalmologist first. The optical performance of the lens must be observed exactly, otherwise glasses will not be useful and may impair vision.
The higher the ratio, the thinner the lens and the smaller it is. bends the light. Lens with a small ratio visually narrow face. It also becomes heavier, which affects the appearance frames. For glass lenses, this ratio is 1.5-1.9, for polycarbonate 1.5-1.7.
Materials of manufacture
Today, lenses are made of polycarbonate or glass. From this the refractive index depends, as well as the wear resistance.
If necessary, lenses with different coatings are ordered. They allow you to get rid of glare, improve vision in the dark days or make the lens transparent and clean by 10%.
What are good contact lenses for the eyes?
About a third of people with visual impairments prefer to wear instead of glasses, contact lenses. They do not cause discomfort in throughout the day, like glasses. In addition, ophthalmologists argue that with regular use of contact lenses vision correction is carried out in a natural way. This is due to the fact that the lens sticks to the pupil, so there are no distortions and refractions Sveta.
The main advantage is the ability to do physical activity, wear protective helmets and use other accessories. Contact lenses are weather resistant changes, therefore they do not fog up, do not crack and do not spoil.
Contraindications are some diseases – conjunctivitis, bronchitis, acute respiratory viral infections, pneumonia, allergies, tuberculosis and so on. It is also not recommended to wear lenses with strabismus. If you comply all recommendations and follow the doctor’s requirements, then no problem does not occur.
Contact Lens Classification
As soon as the ophthalmologist examines and writes out the prescription, start choosing contact lenses. For this also consult with experts. Some optics and clinics offer computer vision diagnostics, so lenses without any problems.
Contact lenses are primarily separated by time service:
A simple option is one-day lenses. They can be used alone. day, after which replace. They are suitable for those who use them. only occasionally. Also, don’t worry about the occurrence of an eye infection, or that the lens deteriorates or get lost.
Long-life lenses cost-effective view. They effectively affect vision correction and help. get rid of problems.
Lenses are also divided into categories depending on the mode:
extended mode – from 2 to 30 days;
mixed mode – you can shoot at a convenient time.
More commonly used day wear lenses, because they let the eyes rest at night. In this case also worry about buying special drops. In addition, they reduce risk of developing eye infection.
Long and mixed wearing requires specific handling. and compliance with instructions. They are not suitable for people with eye diseases. or lacrimal glands.
Depending on the characteristics of the material, there are:
In the first case, silicone is used, and in the second case hydrogel. Hard lenses keep their shape, do not wrinkle and require minimum number of special drops. But they have more eye strain.
Soft hydrogel lenses are easy to put on and take off; they invisible, but at the same time, this material is poorly missed oxygen.
The main classification is based on the purposes of use:
Optical lenses are used directly for vision correction. They are prescribed by a doctor for diseases, including myopia, astigmatism, presbyopia.
Therapeutic lenses are designed to protect the eyes. They promote healing of the epithelium and help to better absorb. medicines.
Cosmetic products are for those who want change appearance. They are able to change the color and pattern of the cornea.
Choosing lenses for glasses or eyes is necessary only on the basis of own preferences. In these matters, focus on recommendations of ophthalmologists who will precisely tell which funds are needed for vision correction or eye protection. Otherwise case they can be harmful.
In the following articles, our experts tell you how to choose a frame for glasses and the secrets of choosing sunglasses.
Attention! This material is subjective opinion of the authors of the project and is not a buying guide.