Photo-therapeutic Keratectomy (PTK) is used to treat corneal surface diseases and scars. PTK is not used to reduce dependency on glasses or contacts but rather to produce a smoother, clearer cornea. PTK uses the excimer laser to remove damaged corneal tissue due to problems such as corneal scars and recurrent corneal erosion, as well as other corneal dystrophies. A bandage contact lens is placed on the eye at the end of the procedure and is removed by the surgeon several days later. PTK is often covered by insurance companies since it is a treatment for a medical problem. PTK is a surgery, as with any procedure there are risks. Your doctor can determine whether or not PTK is recommended and will discuss the benefits and risks that apply to your condition.