What are the different types of intraocular lenses implanted after cataract surgery

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What are the different types of intraocular
lenses implanted after cataract surgery?
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As the natural lens plays a vital role in
focusing light for clear vision, artificial-lens
implantation at the time of cataract surgery is
necessary to yield the best visual results.
Because the implant is placed in or near the
original position of the removed natural lens,
vision can be restored, and peripheral vision,
depth perception, and image size should not be
affected. Artificial lenses are intended to
remain permanently in place, require no
maintenance or handling, and are neither felt by
the patient nor noticed by others.
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There are a variety of intraocular lens styles
available for implantation, including monofocal,
toric, and multifocal intraocular
lenses. Monofocal lens These lenses are the
most commonly implanted lenses today. They have
equal power in all regions of the lens and can
provide high-quality vision at a single focal
point (usually at distance). They usually require
only a light pair of spectacles for optimal
distance vision correction. However, monofocal
lenses do not correct astigmatism, an irregular
oblong corneal shape that can distort vision at
all distances, and require corrective lenses for
all near tasks, such as reading or writing.
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Toric lens Toric lenses have more power in one
specific region in the lens (similar to
spectacles with astigmatism correction in them)
to correct astigmatism, which can further improve
unaided distance vision for many individuals. Due
to the difference in lens power in different
areas, the correction of astigmatism with a toric
lens requires that the lens be positioned in a
very specific configuration. While toric lenses
can improve distance vision and astigmatism, they
still require corrective lenses for all near
tasks, such as reading or writing.
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Multifocal lens Multifocal intraocular lenses
have a variety of regions with different power
within the lens that allows individuals to see at
a variety of distances, including distance,
intermediate, and near. While promising,
multifocal lenses are not for everyone. They can
cause significantly more glare than monofocal or
toric lenses. Further, multifocal lenses cannot
correct astigmatism, and some patients require
additional surgery such as LASIK to correct
astigmatism and maximize their unaided vision.
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