A member asked:

Are there contact lenses for astigmatism of a positive cylinder value?

A doctor has provided 1 answer
Dr. Tim Conrad answered

Specializes in Ophthalmology

Sort of: Astigmatism is recorded in either positive or negative format as to the doctor's preference. Each format can be mathematically converted to other. Contacts are always designated in negative cylinder format.

Answered 12/3/2012

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