What Are Choroidal Neovascular Membranes?

In the eye, a healthy, intact retina is key to clear vision.

Choroidal neovascular membranes (CNVM) are new, damaging blood vessels that grow beneath the retina. These blood vessels grow in an area called the choroid. They break through the barrier between the choroid and the retina. When they leak in the retina they cause vision loss.

CNVM are associated with many serious eye diseases, most commonly wet age-related macular degeneration. CNVM are also found in patients with histoplasmosis, eye injury, and myopic macular degeneration.