Hello David and Duffy !
David your post is interesting because my case is close to mine.
I've got a myopia -5.75 both eyes which all right with CAA, my problem is of binocular vision I've got an esophoria ( eyes inward ) , it is unvisible but detectable by tests. I can't see all the stereopsis just a few ones.
My main problem, i had to be prescribed years ago prisms to be included in my glasses. Because of my increased myopia ( now stable ) it caused a small problem of fusion. When I were my glasses with prisms I've no problem I see normally ( no double vision ).
It was not necessary to get surgery. I asked the question to doctors of Canada and USA who told me to fax just my latest orthoptist and they will decide if in regards of the report i can go for the class 1. Some cases ( it happened ) of pilots with prisms were accepted for initial.
I know somebody operated in childhood for severe strabismus in childhood and now has got his pro licenses US and Canadian. His depth perception is not good at all. But all the rest his ok. For me except vision, i'm ok for all the rest.
So what is CAA's point of view on the question ? Thanks a lot for your anwers.