Medical similiar to CAA one but think a lot stricter.
If you pass AIB for any discipline you have a medical, lung capacity, weight/height, blood samples, urine samples, eye sight, colour blindness etc
On addition to that Aircrew require an ECG, EEG, Opticians eye test and an x-ray. It is why Aircrew have to stay down a day longer if successful.
Hope that helps
Sagey