Lenses for myopia in adults
Myopia affects both children and adults. The reason for the fuzzy perception of objects far from the eye is a violation of the focusing of light rays on the retina (due to the high refractive power of the visual apparatus).
In healthy people, the light rays that form the picture are focused in the center of the retina, and in myopic people, in front of it. This is due to the fact that the cornea with the lens refracts the rays more than necessary. Pathology can be either congenital or form during life (developing slowly or quickly enough).
With myopia, the size of the eyeball may be somewhat larger than usual, then the so-called axial myopia is formed. If the pathology is associated with increased activity of the light-refracting part of the eye, this is a refractive form.
According to the severity are distinguished:
a weak degree of myopia — up to 3 diopters;
medium — from 3.25 to 6.0 diopters;
heavy — more than 6 diopters.
Is it possible to wear lenses with myopia
Lens correction is used to improve vision in any degree of impairment. Including myopia. The main purpose of using lenses is to reduce the refractive power in the optical medium of the eye, focusing the image in the center of the retina.
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What is the difference between lenses for myopia and ordinary lenses?
To correct vision in myopia, doctors select minus lenses. These products have a concave shape, in recipes they are indicated by the sign “-”. With a weak degree of myopia, they are able to correct vision by 100%; in severe degrees, they significantly improve vision by reducing the refractive power of the light-conducting apparatus.
It is important that the diopters of the lenses (their optical power) exactly correspond to the refractive capabilities of the eyes. Therefore, the choice of lenses should be made only after a complete examination by an ophthalmologist, instrumental diagnostics. The doctor will write a prescription for lenses with all the characteristics of the product.
In addition to the number of diopters, it is important to take into account the radius of curvature of contact lenses. It is necessary that when worn, the lens completely repeats the shape of the cornea, otherwise it will move or press on the tissues.
Wearing comfort is also important, so fit and centering on the cornea must be taken into account.
It is equally important to choose the material from which the lenses are made. With eye sensitivity, it is necessary to select soft biocompatible models that are well perceived by the eyes.
Which lenses are best for myopia
First of all, you need to decide which lenses are applicable for myopia — hard or soft.
Most often, doctors recommend soft products, they are easier and more convenient to use, almost not felt in the eyes. They can be made from hydrogel or silicone hydrogel.
Rigid lenses can be used in cases where myopia was the result of the formation of keratoconus or other pathologies of the visual analyzer (corneal deformity). They are dense in structure, do not lose their shape when worn.
According to the replacement schedule, disposable lenses are the most convenient and safe. During the day, various deposits do not have time to accumulate on the surface of the lenses and microorganisms that threaten irritation and inflammation of the eyes multiply. These lenses do not require special care solutions, they are disposed of after removal.
Reviews of doctors about lenses for myopia
“Contact lenses are the most comfortable way to correct myopia,” says ophthalmologist Olga Gladkova. – The patient receives a clear vision, the field of view is not limited by the frame of the spectacle frame. The lenses are comfortable to play sports, drive a car. But when working at a computer for a long time, preference should be given to glasses, due to the increased risk of developing the “dry” eye syndrome.
Popular questions and answers
We spoke with ophthalmologist Olga Gladkova about options for wearing lenses for myopia, possible contraindications to their use, duration of wearing and other nuances.
Are lenses used to correct myopia?
Are there any contraindications for wearing lenses for myopia?
● inflammatory pathologies in the anterior segment of the eye (conjunctivitis, blepharitis, keratitis, uveitis);
● the presence of dry eye syndrome;
● the presence of obstruction of the lacrimal ducts;
● identified decompensated glaucoma;
● the presence of keratoconus 2 — 3 degrees;
● revealed mature cataract.