Posts Tagged ‘multifocal contact lenses’

Traits of multifocal contact lenses

March 17th, 2010

When you reach the age of 40, you may get the problem of presbyopia which makes you unable to focus on the close objects. Even though the reading glasses can correct your vision, you do not like the conveniences and loss of aesthetics. Now, you are lucky to have the option of multifocal contact lenses which are characterized with no glasses while have excellent near, distance and in between vision.

Multifocal contact lenses are available in both soft and rigid gas permeable (RGP) lens materials. Soft multifocal contacts are suitable for part-time wear but not for overnight because long time wearing will cause the xerophthalmia, anoxia and other eye diseases. RGP multifocal contacts require more adaptation for their rigid nature, while providing a shaper and crisper vision. Furthermore, the RGP multifocal contact lens remains in the best position in your eyes and is more comfortable. Hybrid multifocal contact lenses are the exciting alternative of the soft and rigid ones both, which have the RGP center and soft periphery, making it easier to adapt.

There are two main types of multifocal contact lenses: simultaneous and translating ones.

Simultaneous multifocal contact lenses have a gradual power change in the lens which allows a near and distant vision. But this kind of multifocal contacts can be difficult to get accustomed to because your brain has to be selective in processing about which area should be emphasized. Aspheric lens is the common design example of this kind which requires a complicated manufacture.

Translating multifocal contact lenses work the same way as the standard bifocal glasses which have a distinct power area. The top part is used to see far away, and the bottom part for close watching. When you look straight ahead, you are looking through the distance portion, and when you look down, you rely on the lower lid. However, this kind of multifocal contact lens is not proper for the computer user or other intermediate-range vision work. They are best-suited for the driving and reading users for the two distinct powers.

Compared with the traditional reading glasses, multifocal contact lens provides the middle-aged and older people with a new lifestyle. You need not to change the glasses in order to see the near and far objects clear at the same time, one invisible lens is enough for your daily use and keep you active again.