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Additional
toric lens
English Wikipedia - The Free Encyclopedia
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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
.
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