EDIT: Credit to jdogg, who's found a better deal, 20% off site-wide, free shipping included. https://www.ozbargain.com.au/node/275747 Nice!
I love Clearly.com.au, & have purchased from them on numerous occasions. They're always great for offering regular deals & discounts, & this one is in honour of the US Black Friday sales, offering free shipping & $10 off purchases over $99. Their prices are worth checking out, if you haven't already, for both contact lenses & glasses, & they even qualify for some health fund rebates, although it's necessary to check with your fund first if you intend to try claiming one. Enjoy, my visually challenged friends!