Clearly Contacts - 25% off glasses. Rodenstock frames + prescription lenses for $34.50 plus delivery
Coupons are: 72HRGLASSES and 72HRCONTACTS
So, if you get a pair of glasses like one of the Rodenstock (https://www.clearlycontacts.com.au/glasses/frames/rodenstock-4478-satin-charcoal/prod25155.html) for $46 (including frame & lenses), that actually becomes $34.50 after applying the discount. Shipping/handling/insurance are extra....
With my prescription, the standard lenses would be too thick so I'd go the thinner ones that add on the cost of course - but the end result is still way cheaper than anything you're going to be able to get otherwise.