A typical choroidal nevus is slate gray in color and flat. Drusen are a sign of chronicity, i.e. they are present in a nevus that has been present for a long time. Nevi do not usually have orange pigmentation or subretinal fluid associated with them.
Ophthalmic Atlas Images by EyeRounds.org, The University of Iowa are licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.