Contact lenses are definitely one of the most useful inventions of the 20th century and it is recognized by all the people who used them. But, unfortunately, the wearing of lenses is not available for everyone.
About 5% of people are not able to wear contact lenses because they are allergic or a solution for contact lens care, or on the wearing comfort drops or the lens itself, more precisely to the material from which they are made. From 10% to 15% can wear them a short time, due to the fact that their eyes produce tears bad. Therefore, between the eye and the lens does not appear protective film, which protects the epithelium of the eye. In a large number of epithelial nerve receptors and when it comes into contact with the lens, appear discomfort (stinging, discomfort). Sure, it's inconvenient, so in most cases, people with this property eyes just do not use lenses. Of course, we regret the 15-20% of people who can not this kind of vision correction, but let's not do this. After all, he himself does not seem so much a disaster, and glasses has not been canceled.
More people suffer contact lenses normally subject to the instructions for use. Of course it's very convenient. First, for most users points with "four-eyes syndrome" and the imprint easily eliminated. Second, color reproduction, and the magnitude of the surrounding image field of view is much higher than in glasses.
According to statistics, the vast majority of people with low vision do not use contact lenses because of the fear of the process of dressing and removal. This fear is completely inexplicable and totally justified. But after the first visit an ophthalmologist and fitting lenses patients laugh at their fears. After development of the industry has gone far ahead. The lens has become soft, breathable and moist. Try it and you!