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 Is FreshRx available in my state? What if my prescription has expired? Do I need to wear my contacts during my FreshRx test? What is FreshRx? Why/how do you verify my prescription?