English Wikipedia - The Free Encycl...
Download this dictionary
Toric lens
A
toric lens
is a
lens
with different
optical power
and
focal length
in two orientations perpendicular to each other. One of the lens surfaces is shaped like a "cap" from a
torus
(see figure at right), while the other one usually is
spherical
. Toric lenses are primarily used in
eyeglass
es,
contact lenses
and
intraocular lenses
to correct
astigmatism
.
See more at Wikipedia.org...
© This article uses material from
Wikipedia
®
and is licensed under the
GNU Free Documentation License
and under the
Creative Commons Attribution-ShareAlike License