what is ptk eye surgery
Photorefractive keratectomy, or PRK, is a type of laser eye surgery used to correct mild to moderate nearsightedness, farsightedness, and/or astigmatism.
The excimer laser has received attention for its ability to reshape the corneal surface to correct ametropia. Although correction of postoperative refractive errors and anisometropia has been called therapeutic, PTK typically refers to the use of the excimer laser for treatment of other corneal disease.