Superdove
Try not to panic. If your right eye is only SLIGHTLY weak then you should have no problem at all-especially if the doctor didn't seem too concerned.
Off the top of my head, the JAA limits are -3.00 dioptres for each eye including astigmatism. However, I'm not sure how applicable this is because I was issued a CAA medical-not sure if this is still the case?
Take it easy!