toric lens

World English Dictionary
toric lens
 
n
a lens used to correct astigmatism, having one of its surfaces shaped like part of a torus so that its focal lengths are different in different meridians

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Dictionary.com's 21st Century Lexicon
Main Entry:  toric lens
Part of Speech:  n
Definition:  a type of contact lens curved to have a different focal length along each axis to correct astigmatism
Example:  Properly fitting a toric lens takes more of your eyecare practitioner's time and requires more expertise than regular contacts.
Etymology:  1954
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