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Bifocal Contact Lenses For Presbyopia

Jul 23, 2008
People suffering from presbyopia, which makes people unable to read at the usual distance from the eyes and need to place the reading material at a distance further away, were initially prescribed bifocal glasses that could be used to correct two different kinds of problems with the eyes. These bifocal were difficult to manage, so scientists designed contact bifocals for people who wanted to avoid the hassles of bifocal glasses.

If you know of someone or you are having trouble with eye haziness even at arm's length you probably have a condition known as presbyopia. Those with presbyopia will need to have bifocal correction, thus the demand for bifocal contact lenses for those who don't want to wear glasses. A study showed that in 2014 the demand for bifocal contact lenses will be close to double what it is now.

There are two types of contact lenses when you need a bifocal contact lens, the soft contact lens or gas permeable. The gas permeable lenses will last you up to a year before you will need to replace them, while the soft contact lenses are usually biweekly or monthly. The yearly contact lenses are often less comfortable due to protein build up and require weekly cleaning. Depending upon the type of eyes you have will in part make this decision for you. Those with allergies find a soft contact lens lasting for a month is about all they can handle even when they clean the gas permeable weekly. Another benefit of the soft contact is the material used to make it. It is soft and fairly easy to tear, but lighter on your eye than the gas permeable lenses.

Soft and RGP contacts are the two main varieties available for patients suffering from presbyopia. As with the regular wear lenses, they can be disposable or made for long-term usage. The disposable kind is the most popular since the user has the option of using a new pair every day.

Bifocal lenses also come in different designs to accommodate people with different eye problems. With the perfect design, the eyes can adjust the distance and adjust the vision.

Aspheric lenses have a more gradual change between focuses. Both of the powers are in the area of the pupil, and as with the concentric lens, the eye will adjust and learn to choose the proper focus to use.
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