fitness to practice

I don't think there is a set list of conditions that would automatically stop you from practising, which is why you haven't been able to find them. You basically have to ask "Would this person be able to function effectively as a doctor with this problem?" Blindness would make it very hard to do most things as a doctor, but I know a couple of doctors with significant hearing impairment (use hearing aids but hearing is still not "normal") who manage well - though some specialties are harder than others for them.

A disability that someone acquires as a doctor may also be treated differently from one which someone had before starting - for example if a qualified GP had an accident and ended up in a wheelchair, they may be able to continue to work as a GP, but it would be very difficult for someone in a wheelchair to cope with clinical placements at medical school and life as an FY1/2 before moving to a more "wheelchair-friendly" specialty.

i work at a hospital atm as a reapplicant but i know for sure there is a medical student at the hospital i work in who is in a wheel chair. obviously i dont know the circumstance but it just shows that it can be done. perhaps special circumstances will be considered when it comes to fy1/2 with regards to where this person goes. i'd imagine there are lots of placements that simply are unsuitable but something can be worked out no doubt.