Implantable Collamer Lens

A phakic lens implanted in front of the natural lens

Overview

An implantable collamer lens is a type of phakic intraocular lens, an artificial lens placed inside the eye while the natural lens is left in place. It sits behind the iris and in front of the crystalline lens and is made of a soft collagen copolymer material. It is used to correct myopia, including high degrees, and astigmatism, and is often considered for people whose corneas are too thin or irregular for laser vision correction. Because the natural lens stays, the procedure is in principle reversible. Recognized risks include cataract formation and raised eye pressure, so lens sizing and follow up are important.