It strikes me that 'sporadic' does not mean this is a permanent situation.

Also, complete occlusion means complete blindness in the eye. At most, he has an occlusion of a branch, and even then, a 'sporadic'(?!) one. I'm sure the eye jerk did a fundoscopic exam so he did see something that requires further study.

As for giving what may be a prospective diagnosis OR a 'rule out' on a fucking post-it note, it's completely unprofessional and the guy should be reported to somebody. Most hospitals have patient advocates.