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Avascular PED may also occur, usually preceded by the presence of confluent soft drusen.
All centers are actively recruiting AMD patients with bilateral soft drusen (BSD), the form of "dry" AMD which is present in both eyes and are at risk of severe vision loss from progression to wet AMD.
7) Soft drusen are larger--more than 63 microns, which is half the diameter of a retinal vein as it crosses the optic disc.