Cataract extraction is the surgical removal
from the eye.
A cataract is an opacity in the lens
of an eye
and causes reduced quality of vision.
There are two basic methods of cataract extraction:
- Extracapsular cataract extraction is the more modern
procedure and is performed in many cases. This involves removal of the
cataract-affected lens only, with the lens capsule left in place to
support the remaining lens tissue and the (artificial) intraocular lens
inserted during the procedure.
- Intracapsular cataract extraction is an older method
during which all of the lens and lens capsule is removed before an artificial
lens is inserted as a replacement.
It is useful to be aware of both of these techniques because former cataract
patients may have received either treatment.
This section includes short definitions of clinical and surgical procedures
concerning the eyes and human visual system. For definitions of other
terms in this category, choose from the list to the left. Other related
pages include the diagram
of the eye, and definitions
of parts of the eye, a description
of the human retina, and the section about disorders
of the eye and visual system.