deuteranomaly

I, as a student, preferred the classrooms with dry-erase boards, because the big lecture halls didn't have blackboards, they had greenboards, and between my difficulty in seeing green deuteranomaly and the glare of the fluorescent light tube that some genius had installed right at the top of the board reflecting off the chalk dust, I couldn't see a damn thing but a blank sheet.

Here's one from the "What were they thinking?" files. Angry Professor 2009