What is wet age-related macular degeneration?
Wet AMD develops when abnormal blood vessels start to grow through important layers of the macula that have been weakened by the dry form of AMD. This abnormal growth of blood vessels, called choroidal neovascularization (CNV), can cause bleeding, leakage of fluid, and scar tissue formation in highly sensitive parts of the macula. When this happens, loss of central vision can be rapid and severe. Although only one in 10 patients with AMD will convert from the dry to the wet form, the wet form accounts for 90 percent of the vision loss associated with AMD.
