Intraocular Lenses (IOLs)
intraocular lens (IOL) is a tiny, lightweight, clear plastic disk placed in the
eye during cataract surgery. An IOL replaces the focusing power of the eye's
lens of the eye plays an important role in focusing images on the retina. If
the lens loses its clarity, as it does when a cataract develops, light rays do
not focus clearly and the image one sees is blurry. Glasses or contact lenses
cannot sharpen vision if a cataract is present.
only treatment for a cataract is to remove the lens and implant an IOL.
Intraocular lenses have many advantages. Unlike contact lenses, which must be
removed, cleaned, and reinserted, the IOL remains in the eye after surgery.
IOL may be placed either in front of or behind the iris. Behind the iris is the
most frequent placement site. They can be hard plastic, soft plastic or soft
silicone. Soft, foldable lenses can be inserted through a small incision which
shortens recovery time following surgery.
evolution of IOL designs, materials, and
implant techniques have made them a safe and practical way to restore normal
vision after cataract surgery.