I don‘t want to be nit picky (but I will, as it is my way....): you don‘t have to be particularly smart to be in the Army (actually, being smart in the Army is counter-productive usually ;} ), but proper spelling and grammar count for something nowadays, even in the Infantry (or Armour Corps, which I am a member in somewhat good standing).
I assume "pea test" is the drug testing (which I pray to God, Allah and/or Buddha in this day and age is done to new recruits...). "Clurk‘s" need to have a reasonably good grasp of English (it‘s "clerk", or more precisely Resource Management Support (RMS) Clerk).
Anyway, enough criticizing: I just talked to my wife (she‘s a medical technician) and she suggested you look up CFP 154 Medical Standards (here‘s the link: http://www.forces.gc.ca/health/policies/med_standards/engraph/annex_e_e.asp ) and it will show a list of trades and minimum requirements (it‘s a PDF file). You could also think about getting laser eye surgery done (at your own expense), but I would DEFINITELY confirm that they will still allow you to enter with that done (I think that there have been about a million and one posts ref this subject on this forum, so do a search first, and a Barrack Block Lawyer will have answered that already...)
In case they haven‘t told you, your vision has to be a certain level "unassisted" (i.e. no glasses, contacts, X-Ray vision ,beer-goggles, etc). Getting "riot" gas under contacts is quite unbearable I‘ve heard, let alone the more nasty chemical agents you could be exposed to, hence you wouldn‘t be able to wear contacts in "battle".
Anyway, I hope that helped somewhat (keeping in mind that I‘m a crewman with limited knowledge of the medical system.... though I do know 3 points of contact during your over 35 medical is a bad thing.... make the bad man stop).
Al