Figure 1: Angiomatosis retinae (von Hippel-Lindau disease)
Goldberg and Koenig reported success in occluding small and medium-sized feeder arterioles but not the larger ones. Even the initially successful ones were not always permanent. Gass recommends direct treatment of the angiomas with laser without preliminary attempts to occlude the feeder vessels.
For tumors larger than 2 to 2.5 disc diameters in size or in which the media are not clear, cryotherapy is generally considered the treatment of choice, given the location permits use of this modality.