You can claim only eligible medical expenses on your return if you, or your spouse or common-law partner:
・paid for the medical expenses in any 12-month period ending in 2015
・did not claim them in 2014.
Tax tip: Select your 12-month period to maximize the tax credit.
The 12-month period ending in the year may vary from year to year, but you cannot claim the same expense twice.
Keep your receipts for next year if some of your 2015 expenses are not claimed as a credit in 2015.