Re. eyesight
hi ya.
Your correct the CAA require that short sight must not exceed -5.00 diopters.
I had -4.75 on my left eye which was the worst of the two,plus i also have an Astigmatism in both eyes.
I then got Lasik lasor surgery to loose the glasses.
A letter from the CAA says that i'll pass the vision requirements for the class one medical.
They don't go on post op figures, they go on what my eyes were like before the surgery. Crazy i know.
So you will have no problem.
Goodluck.