The shape of the cornea is what determines whether you are nearsighted, farsighted, have astigmatism, or have normal vision.
Physicians can program the laser to sculpt the cornea.
You should bring your glases or contacts with you. Throughout the Lasik procedure, you are awake. The doctor gives you some eye drops to numb your eyes so that throughout the entire procedure you are comfortable. Next, using an automated instrument called a microkeratome, the doctor removes a think layer of the cornear. Therefore, the shape of the cornea is corrected under the surface.