The history of contact lenses and the benefits they bring the wearer is a fascinating topic, especially since the correction of myopia is a widespread need.
How do contact lenses work?
Contact lenses are small prescription lenses worn directly on the eye. They have been designed to correct vision defects and preserve eye health. The lenses float on the tear film, which covers the cornea.
Modern contact lenses are much more than small lenses worn on the eye. However, they do work like glasses by refracting and focusing light rays so that the objects appear clearly. Since contact lenses stick to the tear film on the eye's surface, it moves naturally with it. This is one of the many advantages of contacts compared to glasses.
A multitude of contact lenses on the market
Not all contact lenses are created equally. Each model is designed to meet different needs and can be worn for various lengths of time, from one day to two weeks to one month. Lenses also meet specific needs, including the correction of nearsightedness.
Myopia is a vision disorder that results in blurred distance vision and sharp near vision.
Contact lenses have different power units called diopters. If you wear them, check the box or your prescription for the information. You will see a minus sign or a plus sign, followed by numbers. Without going into too much detail, this value indicates the shape of the lens. There are different lens shapes to correct various vision problems. To correct nearsightedness, the lenses are spherical and have the same weight over the entire surface.