The LENS, or CRYSTALLINE LENS, is the second (and weaker) of the two focusing
structures inside the eye. When we are young, the lens can change shape when the muscles
of the ciliary body pull on it. This allows us to focus on objects at differing distances.
Over time, the lens becomes harder and this focusing ability is lost.
The normal lens is clear. If the lens becomes cloudy or hazy, it is called a CATARACT. Cataracts are common in older individuals. If a
cataract causes a loss of vision, an operation can be done to remove the hazy cataract and
restore vision. In most cases, a plastic, acrylic or silicone lens is put inside the eye
during the operation to take the place of the natural lens.