What are contact lenses?
It is already clear from the title that this remedy for vision correction involves close contact with the eyes. Widely used lenses of steel from the middle of the last century. Once these lenses were a rather dense sphere, which it was hardly possible to wear all day. Now the lenses are much thinner, they are almost invisible and almost not felt.
Nowadays, there are many kinds of contact lenses. They can be hard and soft, they can correct not only myopia and hyperopia, but also astigmatism. There are even lenses created specifically for athletes. For example, tennis players use lenses that increase the contrast in color rendition, so they can more clearly see a small yellow ball. There are lenses that are created solely for decoration. Some of them change the color of the eyes, others are able to turn an ordinary human eye into a cat, decorate the pupil with stars or flowers.
By the expiry date contact lenses also differ - there are lenses that need to be changed every day, there are those that have a shelf life of more than 18 months.
How to choose lenses?
Despite the availability, lenses - this is a medical device for vision correction. Therefore, you should choose the right ones only after consulting with a doctor. They must match the disease, your vision, the shape and size of the eyeball. Only the specialist can find the right ones, so it's better to have a prescription, which the ophthalmologists give out when they register the usual glasses. Knowing the features of your vision, the doctor prescribes lenses from the desired material with optimal breathability and moisture content. This will make you feel comfortable and reduce the risks of possible complications.
Lenses should be bought in a kit with care products. Usually this is a special container for storage, tweezers and liquid for disinfection. Previously, contact lenses had to be boiled after each use. Now it is enough to put them in the solution for several hours, and they will be ready for use again. You should know that some lenses need daily cleaning, since they are not intended for wearing for more than 6 to 12 hours, while others can be worn for up to a month, so each of them needs individual care.
For whom and what are the dangerous lenses?
Contact lenses are very many people, but there are those to whom they are categorically contraindicated. If a person suffers from chronic or acute diseases of the eyelids, for example, conjunctivitis, then the lenses can not be worn. They do not suit people with high eye sensitivity and with diseases of the lacrimal ducts.
Some experts believe that lenses are useful, that they stop the process of myopia. Others argue that people. Who wear contact lenses permanently, are more susceptible to various infectious and other eye diseases. In order to make unpleasant surprises happen, as rarely as possible, you need to observe security measures.
-If you just start wearing contact lenses, get used to them gradually, do not wear them for several hours without removing.
- Keep a handy eye irritant on hand, since the lens creates a feeling of dryness and causes redness and itching.
- Carry a container for lenses and glasses in case there are unpleasant sensations that will not pass within half an hour. Then the lens will need to be removed.
-Do not leave the lenses at night unless they are intended for prolonged wearing.
-Purchase 2 pairs of lenses and wear them alternately every other day, but without mixing lenses from different pairs.
-Only remove and put on lenses only with clean hands, it is also important to keep the container in which they are stored clean.
-Every half a year it is necessary to visit the oculist in order to make sure that the lenses do not damage the eyes.
Contact lenses - a convenient and useful invention, which can badly spoil life if you do not follow the rules for caring for them. If the doctor strongly advises wearing glasses, it is unlikely that a good solution will be to buy lenses. But, one way or another, they are used by millions of people around the world and those who approach their health with all responsibility, have no reason to complain about the negative consequences of wearing contact lenses.