When I was at CABC in the early 90s we had to recourse an Army Cadet who convinced the courts that he was perfectly capable of performing the requirements of a basic parachutist despite having only one eye. He had been medically RTU'd after completing most of the ground phase when the PI discovered his so called "handicap". His doctor evidently chose the ignore the vision requirements that were in force in those days. So I am not held too in awe of pre requisites for this or any other course. BTW the individual concerned passed the course second time around, and I employed him a number of times as a casual parachuhtist on TALS training afterwards(he was a reservist by that point), totally without incident. Good guy.