I developed NAION in my left eye after receiving immunotherapy for skin precancers. I wasn't told about the side effects before the treatment. I've been researching the opthalmic side-effects associated with immunology. Here are a few articles.
https://jitc.biomedcentral.com/articles/10.1186/s40425-016-0170-9
https://www.asbestos.com/news/2018/03/27/immunotherapy-drugs-vision-issues/
Has anybody else had immunotherapy which resulted in NAION?