From what I understand, optometry in Canada is still a growing field. The scope of practice is not as developed as in the US but it's slowly getting better. Ontario has the larger scope of practice atm. Other provinces like Alberta are trying to follow suit, pushing to allow optometrists to prescribe medications.
Optometry is regulated in all of the provinces and territories, except for Nunavut. Comprehensive exams are not covered for anyone in Saskatchewan and the Maritime provinces, while only those between 19-64 years of age need to pay out of pocket in Ontario and Quebec. The rest of the country does things a little differently but all diabetics and those with medical reasons are covered.
There is (supposedly) an oversupply of optometrists in Quebec, and optometrists are having a harder time in British Columbia because of the legislation that passed, allowing opticians to do "refractions".
Optometrists looking to serve are only contracted by the Canadian Forces as opposed to being in uniform, like those in the US.
Hospital based optometry is not as prevelant either, with only four or five optometrists in the country who actually work in a hospital setting on a regular basis, but they do so in a research capacity and not so much patient care.
Regardless, from what I've seen and learned, optometry in Canada is doing relatively well, with lots of room to grow.