Purpose: To identify the precise choroidal abnormalities associated wi
th idiopathic polypoidal choroidal vasculopathy (IPCV), patients with
IPCV were examined with indocyanine green (ICG) videoangiography. Meth
ods: Twelve patients with IPCV were examined using standard clinical,
fluorescein, and ICG videoangiographic techniques. Results: Indocyanin
e green videoangiography showed two basic choroidal vascular changes:
a branching network of vessels in the inner choroid, and vascular dila
tions at the border of the network of vessels. The vascular dilations
appeared to be associated with the exudative and hemorrhagic manifesta
tions of IPCV. Conclusion: The choroidal vasculopathy seen in IPCV is
distinct from the changes seen in other choroidal abnormalities. Recog
nition of these changes aids in diagnosis and patient management, sinc
e the clinical implications of IPCV differ from those of other similar
entities.