Laser is used during Lasik eye surgery to remove definite amount of tissue from the cornea.
Before the surgery the eye doctor conducts the detailed surgical and medical history and does a comprehensive examination of the eye. He will measure the cornea and take note of its shape, thickness, contour and irregularities if any.
You will need somebody to bring you home after the surgery as the vision may be blurred and you may still be affected by the effects of the medications