Thierry Zeyen of Belgium has built a website to teach optic nerve head evaluation. Our residents have used this site and been impressed that they have learned to be better optic nerve examiners (http://www.egodap.be/).
One of the things that I miss from the "old days" is looking at color slides of the optic nerve in stereo. The transition to digital images has made this more challenging and less frequently performed. Dr. Peter Lalle has created a video of stereoscopic images that will help to make you a better examiner of the optic nerve with the slit lamp and indirect lens (https://vimeo.com/373647096).