If you are interested in having laser vision correction, you will need to have a pre-surgical examination to determine if your eye is healthy and suitable for surgery. This will include a complete medical and eye history, and thorough examination of both eyes, including Wave Print refractions and computerized mapping of your cornea. Before the surgery, please tell Dr. Cheng whether you take any medications or if you have any allergies. Also, talk with Dr. Cheng about eating or drinking immediately before the surgery. You should also arrange for transportation, since you must not drive immediately after the surgery. You may resume driving only after receiving permission from Dr. Cheng.