What do I need to renew my prescription with FreshRx? You'll need: your smartphone to enter your responses; a computer (or tablet) to display the eye chart; 10 feet of space; your existing prescription details; and to be wearing your current contact lenses. Related articles What if my prescription has expired? Who can take FreshRx? How much does FreshRx cost? How long does delivery take? What is FreshRx?