Optic-disc.org is an free, educational resource for anyone who is required to examine the optic nerve – like us… at some point… when we can figure out how to use a fundoscope…. There are pictures of discs galore.
Check out OphthoBook for slit-lamp examination and plenty other handy bits and pieces.
These guys make hilarious eye videos, our favourite of which is on cranial nerve palsies.