What Causes Wet AMD?  

The specific cause of wet AMD is the growth of new, abnormal blood vessels immediately under the retina, which is a lining in the back of the eye.  This condition is known as choroidal neovascularisation, or CNV.  As these abnormal blood vessels grow under the retina, they leak and bleed  (thus the name “wet” AMD).  This causes damage to the macula, which is the portion of the retina that is responsible for sharp or focused vision (see illustration below).