glossary

A lens having two separate and distinct points of focus (focal lengths) which incorporate two different powers in each lens, usually for near and distance corrections.

Part of the eye anterior to the crystalline lens , including the cornea , anterior chamber , iris and ciliary body .

The term given to a drug which retards cell division and slows down healing. In glaucoma surgery, antimetabolites are often used to prevent the drainage site from failing because of scarring.