Bifocal contact lenses are designed to provide clearer vision for those suffering from presbyopia.
This condition, a result of the aging process, is also called long-sightedness. One of the most common signs forewarning the development of presbyopia, is the need to hold reading material like books and newspapers, further away from your eyes, in order to read the small print.
Bifocal contact lenses are available in both soft and rigid gas permeable materials. Some lenses are designed to be worn for a specific period of time. Once these contact lenses expire, they should be disposed of and replaced with new and fresh lenses. These lenses gives the wearer greater convenience, as you don't have to spend time cleansing, an essential routine for wearers of non-disposable contact lenses.
A number of contact lens manufacturers provide multifocal contact lenses, made from a silicone hydrogel substance. This material allows for a greater degree of oxygen to travel to the cornea, compared to conventional soft contact lenses. For this reason, silicone hydrogel lenses are a lot more comfortable, when wearing lenses daily for extended periods and while sleeping.
Various brands of multifocal silicone hydrogel contact lenses include Air Optix Aqua Multifocal, by Alcon, Acuvue Oasys for Presbyopia, by Johnson & Johnson, PureVision2 for Presbyopia, by Bausch + Lomb and Biofinity Multifocal, by CooperVision.