Concentric design bifocal contacts - Multifocal contact lens designs for presbyopia correction

Concentric design bifocal contacts have the distance correction in the center of the lens, and the near vision correction, or reading correction, at the outside of the lens. This multifocal contact lens design is not strictly limited to distance and near powers though. The outer ring of the lens can contain a gradually transitioning power for better vision at all distances. The opposite, or inverse, of this design is also available where the center of the lens contains the reading power and is surrounded by the progressive distance correction.

Concentric design bifocal contacts are prescribed to people with presbyopia, which is the condition where you need one prescription for distance and another for objects close up (such as reading materials). This condition happens to many of us as we get older, usually around age 40. Bifocal contacts (or multifocal contacts) are designed to give good vision to people with presbyopia.

Other bifocal contact lens designs for the correction of presbyopia include:

Simultaneous vision contacts

Alternating vision contacts and

Monovision

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