Franchii,
When I got my initial Cat 1, ~20 years ago, I was almost identical to you (no astigmatism, though..) I applied for 'flexibility' of the vision requirements - I think that my opthalmologist had to write a letter stating that my eyesight was correctable to 20/20, and had been stable at that prescription for a few years - thanks to all that, a waiver was granted, and I was off to the races.
Best thing to do would be to find a Canadian Aviation Medical Examiner in your area, spend the $ for an exam, and start the process. Then you'll know for sure..
Good Luck!