I broke the rules as far the eye test is concerned. Their letter said we MAY use eye drops etc etc. So I took the chance that they wouldn't. Sod's law, they did, which made my EEG very painful flashing strobe, dilated pupils and high intensity light don't mix. Also I couldn't focus and had great difficulty in signing the bits of paper they put in front of me. Had to sit in the car for two hours before I could drive home, I waited till I could read the number plates in the car park. Still I passed.