How not to be mistaken when choosing contact lenses?
Contact lenses are currently the most common means of correcting vision. Now on the market there are a huge number of models of contact lenses from various manufacturers, lenses biomedics , diazo, Johnson & Johnson, etc. A large selection poses the task of finding a quality product for buyers. How to choose the right lenses? What to look for when buying? Let's talk about this.
It is best to contact a professional ophthalmologist who is able to select lenses based on a person's level of vision, individual intolerance to materials and taking into account the structure of the eye. For this, doctors use slit lamps. This is followed by a check of the fit of the lens in the eye, since this is the main guarantee of convenience during further wearing.
All contact lenses are divided into soft and hard. Accordingly, they perform different tasks. Rigid lenses are used to correct the shape of the cornea, while soft lenses correct a person's vision with myopia, and are also used for mild astigmatism. Orthokeratological lenses can also be distinguished, but they are not intended for daily use. These lenses are worn only at night, and during sleep they correct the cornea, which allows a person to do without glasses during the day.
Contact lenses are currently made from a variety of materials. The greatest ease of use and safety are lenses made of silicone hydrogel, since they are less sensitive to moisture, and allow air to penetrate to the shell of the eye. Naturally, they are the most popular.
In terms of wearing modes, half-year lenses are considered the norm, but there are also one-day, bi-weekly and monthly lenses. Daily lenses do not require any special care and are therefore the most convenient to handle. In this case, the only disadvantage is the high cost, which is beyond the means of many. The antipode is traditional lenses, which are significantly cheaper in price, but due to their thicker design, they are less convenient to use, allow less oxygen to pass through and have a high dryness.
The most popular and common are monthly and bi-weekly contact lenses, which allow them to remain on during a night's sleep, and also do not wash off during bathing. The operation of such lenses implies their storage in special solutions, so it is better to choose products for sensitive eyes, which will avoid the occurrence of allergic reactions.