It is a surgical procedure that uses a cool (non-thermal) beam of light to gently reshape the corner’s the surface of the eye to improve vision. The laser removes microscopic bits of tissue to flatten the cornea (to correct nearsightedness) steepen the cornea (to correct farsightedness) and/or smooth out corneal irregularities (to correct astigmatism). The goal of laser eye surgery is to change the shape the cornea so it does a better job of focusing images onto the retina for sharper vision. LASIK and PRK are two types of laser vision correction.