Monovision, which corrects one eye for distance vision and one for close-up vision, so that reading glasses are not needed, is an option, but should only be considered if you've tried monovision with contact lenses first. The procedure is safe, but complications can occur. The cornea can become infected or the flap may develop a wrinkle when it is laid back down over the eyeball. In about one to ten percent of cases, retreatment may be necessary to laser the cornea again and further refine vision. Ask about the type of excimer laser your surgeon will be using.
Some lasers give a much smoother cut.
M.D. For example, these photos show the surface of a plastic lens that has been cut by various manufacturers' lasers. The photos on the far right are magnified by an electron microscope 12 times. The photos on the left magnify the center of the image 150 times. The photos on the left show how laser cuts vary from device to device. Plus, it automatically tracks eye movement.