I recently purchased a 90 day supply of contact lenses from Sav On Lens. Not too long after placing my order I went in for my annual eye exam and it was determined I needed a stronger prescription. When I called Sav on Lens to see if I could exchange two of the six boxes that had never been opened they said emphatically no. Their policy limited exchanges to 30 days after an order shipped. This is very convenient for them but terribly unfair to the customer. The boxes I want to return are in perfect condition, never opened and very easily resold. However Sav On Lens was totally uncooperative and unwilling to exchange for my new prescription. I will never do business with such an customer unfriendly company again and I would advise anyone to stay away from them.