but (at least here in the UK ) this is absolutely 100% and non-negotiable
It should also be mentioned, in order to be completely fair to all, that some other countries' rules are nowhere near as proscriptive as ours. We have, for example, read on here in recent times of professional pilots on anti-depressants and other psycho-active medications.
Presumably those same countries will be just as liberal in their approaches to epileptic, or perhaps even blind, pilots.
The UK standards are firm, fair, sensible, and long-lasting.