If after a few days you feel that the lenses are working for you and you would like to order a box of lenses all you have to do is call the hosptial and let them know. We may have your number with us in our stock or may have to order the lens from the company. If we have it in our stock you will get it right away. If however we have to order it from the company it would take three working days and you would get a call from the hospital once we receive the lenses.