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A huge variety of contact lenses are available today. When buying, it is recommended to consult an ophthalmologist. The doctor will check the vision and advise which lenses are best to buy in the store http://www.linzshop.ru/catalog/brand/purevision/.
What are lenses
1. By hardness. Soft lenses are necessary for impaired vision in the distance (myopia) and near vision (farsightedness). Hard ones should be bought, for example, with keractonus.
2. According to the material. They are made from many different materials. All are of high quality, not dangerous for the eyes.
There are:
- Hydrogels. Pros: easy to pick up, no discomfort, you can immediately get used to wearing it. Disadvantages: "dry" eye syndrome, they may tear, they do not give the eyes proper oxygen.
- Gas-permeable. They feed the eye well with oxygen. Pros: they won't tear, keep their shape, will last a long time. Disadvantages: it takes time to get used to them, difficult selection, they can temporarily change the shape of the cornea.
- Silicone-hydrogel. The most purchased lenses are good for the eyes. Advantages: easy to put on and take off, can be worn for a long time and many other advantages. Cons: you have to get used to it.
3. By duration of wearing. It is best to buy lenses that change every day (daily), when wearing them, there are fewer chances of getting an infection. There is also:
One to two weeks.
One month.
Three months.
Six months.
One-year
Safety also depends on how the lenses are handled: hygiene before removing and putting them on, following the doctor's recommendations, and so on.
4. According to the mode of wearing. According to the regime, they differ in:
Daytime (worn only during the day and taken off at night).
Flexible (can be left for 1-2 days).
Prolonged (week without filming at night).
Continuous (up to a month without filming at night).
Again, each person chooses what is convenient for him. On long-distance trips, when there is no possibility of replacement, you can buy lenses for long-term wear, depending on the duration of the trip. Some people have eyes with increased sensitivity that cannot withstand long-term use of lenses, so you should buy daily ones. Protein and lipids will accumulate in long-wear lenses, which leads to irritation.
All lenses undergo sufficient safety tests and studies, so everyone should choose what suits them best.
5. By optical power. It is not necessary to buy lenses of the same optical power as glasses, because the vision will be better in lenses than in glasses with the same power, since the lens is located on the eyeball.
Selection with the help of an ophthalmologist
Wearing glasses differs from lenses, which are worn directly on the eyeball, so you need to choose them only with a doctor. As soon as you feel that your vision is getting worse, you should contact an ophthalmologist for a check-up. It is better not to delay, as there are serious eye diseases that develop very quickly. With the help of special devices, the doctor will measure all indicators that are important for the correct selection of lenses (intraocular pressure, visual acuity, etc.) and write a prescription. If a person has never worn lenses before, training is provided in the optician's salon.
How to wear lenses correctly
They should be put on and taken off only with clean, soap-washed hands. You can throw out daily lenses in the evening and take new ones out of the package in the morning. Day-wear lenses should be removed in the evening, put in a container with fresh solution and put on in the morning. Long-term contact lenses need to be cleaned with a solution once or twice a month.
You should study the instructions for use and find out how many hours you can wear lenses. Do not re-wear daily lenses!
It is necessary to remove it when visiting the pool, bath, sauna.
Do not wear when: symptoms of flu and cold, dryness and irritation in the eyes.
