Indocyanine green angiography shows that IPCV vessels fill slower than choroidal vessels. The network of abnormal vessels is also larger than suspected clinically. The polypoid structures leak dye slowly. Vision is typically better in IPCV than in ARMD and vision can be improved with treatment of the lesions. In some cases, scarring can occur with attendant visual loss.
Treatment is carried out to areas of leakage from the choroidal excrescences.
IPCV can be differentiated from ARMD in the following ways. ARMD patients are usually Caucasian. They usually have typical drusen and RPE changes which are often bilateral. The vessels seen in CNV due to ARMD are not clinically visible. There is frequent scarring.