Popular contact lenses

Lenses of different sizes

In the 40s of the 20th century, only scleral lenses were known to humans, i.e. Those that cover the entire visible part of the eye. These days they are not very popular, but they are still used. For example, when shooting movies, if you need to make the eyes completely red. You can buy them only outside of Russia, because this product is not certified in the country. Scleral can be purchased by individual order. Doctors use them for medicinal purposes. For example, their use is prescribed for patients who have undergone several complex operations. Lenses in this case are a bandage.

The most popular lenses are soft corneoscleral. those that are slightly larger than the cornea. Earlier, the popularity of the root - hard. Their diameter is 5 mm less than that of soft ones. Corneal is better because less sediment accumulates on their surface, which reduces the risk of developing eye infections. Their downside is that it's easier to lose them. They are more mobile than soft. Corneal lenses are more palpable for the eye, so they have to get used to longer. With certain eye diseases, patients are prescribed precisely hard lenses. For example, with keratoconus. This disease, in which the cornea deforms from a spherical to a conical shape.

Night eye healers

For some diseases the doctor prescribes hard lenses for the patient, which must be worn only for the night. This method of therapy is called orthokeratology. At night, a rigid lens presses the cornea, and in the daytime the cornea keeps the correct shape and the person has normal vision. This method is used to treat medium and weak myopia, with minimal astigmatism. According to some ophthalmologists, orthokeratology is unsafe. They believe that night use of lenses contributes to poor washing of the cornea with a tear, which can cause bacteria to multiply. Studies of this issue have refuted this information. It was only found that complications can occur only in cases where the patient did not follow the recommendations for the use of lenses.

Lenses of the future

Experts consider lenses not only as a tool for vision correction. For example, Google recently introduced lenses in which the camera is embedded. They help to create an additional reality, and in the long term they can improve the sight of visually impaired people.

Google also announced the development of lenses that measure glucose. This product will be an excellent acquisition for people with diabetes.

There are already available on the market, diagnosing glaucoma at the initial stage of the disease.

There are also lenses that treat eye diseases. They contain medicines and release a daily dose of the treating substance. For example, there are, which contain drops from glaucoma, antibiotics. Their use frees a person from the daily use of medicines.

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