About Artificial Lenses

The artificial lens is also called an "intraocular lens implant". It is a
transparent plastic disc with a shape similar to the natural lens. Two
plastic extensions press against the capsule and lock the lens in
place in the back portion of the lens capsule.

Usually, the focus of the lens implant is prepared according to your
surgeon's prescription and made for distance vision. In some cases,
the refractive result after surgery may be outside the intended range.
This is particularly true if the patient had pre-existing astigmatism.

Most people fitted with modern intraocular lenses will not need spec-
tacles for distance vision. However, others may require glasses for
both distance vision and close vision, such as reading.

The quality and safety of artificial lenses has almost eliminated the
need for thick cataract glasses and contact lenses. Of every 100
people who have cataract surgery, about 95 will be able to have an
artificial lens fitted. Lens implants are the preferred treatment, but
glasses or removable contact lenses may be options for some patients.

Most lenses are made of silicone, acrylic or "PMMA", but other mate-
rials are under development. While these materials are safe and effec-
tive if you think you may have a sensitivity to any of these materials,
tell your ophthalmologist.

Modern artificial lenses are designed to be placed permanently within
the lens capsule.