This online resource from the National Eye Institute is a vast collection of ophthalmology cases and images. I have put it into the Ophthalmology Room I am building as part of the Library's web portal developments. (The room will be launched later in the year). But notices I have seen in various places tell me that this is a new resource - so I am mentioning it here as well!
The collection is at http://vision4.nei.nih.gov/Cogan/index.jsp