At the risk of sounding like a chauvanist, I agree that women may have the same skills as men to drive race cars, but I don't think there are to many that have the aggressiveness it takes to win in race cars.
I think it has something to do with that testosterone thing.
I have seen a fair number of female track workers though, so that is a definete possibility. There are plenty of different jobs to do at a track, so I'm sure they could find something for you even with your eyesight problem.