Hyperopia and myopia are the most general vision problems. In mostly cases people have to suffer from any one of these problems and they become very much disturbed. Also, there is also another problem that most of the prescription glasses are manufactured to correct only one kind of the refractive error. However, it is also a fact that there are some people who have both type of the vision problems and they want to find out any solution for this.
They require the vision correction of both near and distance objects. It is very obvious that the single vision eye glasses or contacts are for one purpose. But now they do not need to be worried about it because bifocal contact lenses can easily provide them the opportunity to resolve both of the problems. Bifocal contacts are specially designed for these people who have both problems and these lenses are designed with two lenses, one for the hyperopia correction and other for the myopia correction. On the whole a pair has basically four lenses.
In the teenage and even in the young age mostly people have the weakness to see the long distant things which is known as the long sightedness. They can buy the single contact lenses which can be corrected with them. But after the age of 40 or 50 people may have the problem of the both and they need the glasses or the bifocal contact lenses and of course the single vision eye glasses and contact lenses cannot fulfill their requirement.
The old bifocal contacts have the visible lenses which give them very unnatural look. but with the progress of the technologies these bifocal contact lenses are available in a more natural look. Anybody who wears them cannot be judged by other that he is wearing the contacts. This is really a good thing if you have an alternative to change your eye color. You can wear the good quality colored contacts to give you a very shallow and scary looks simply changing with the color of the eye balls instead of using the eye prosthetic effects. Black contact lenses are one of the best options to have the scary look. Some may get the idea that it is really weird that black contact lenses can actually give the scary look as most of the people in the costume parties or Halloween parties wear the red contact lenses for making them look like witch or vampires.