LASIK is a surgical procedure that can reduce a person's dependency on glasses or contact lenses. The procedure permanently changes the shape of the cornea (the delicate clear covering on the front of the eye). For clear vision, the eye's cornea and lens must bend (refract) light rays properly, so that images are focused on the retina. If the light rays aren't clearly focused on the retina, the images you see are blurry. LASIK stands for Laser-Assisted In Situ Keratomileusis and is a procedure that permanently changes the shape of the cornea, the clear covering of the front of the eye, using an excimer laser. What is the real difference between conventional Laser Eye Surgery and Custom LASIK Eye Surgery? Conventional Laser Eye Surgery Conventional Laser Eye Surgery treats the vast majority of common optical aberrations called "lower order" aberrations. These are responsible for causing nearsightedness, farsightedness and astigmatism. Custom LASIK Eye Surgery provides a more precise treatment for patients who have "higher order" aberrations, which we can now measure with the Aberrometer. For these patients, customized laser eye surgery may provide a better quality of vision by measuring and addressing all of these aberrations as part of the treatment plan. During LASIK surgery, a small incision is made in the cornea to create a flap. Then, a laser beam works within the cornea to reshape it for vision correction. After the reshaping, the flap is put back into place and serves as a sort of natural bandage. Will I Need Reading Glasses After the Treatment? Generally, patients under 40 years of age read well without glasses following the treatment. Patients over 40 may need magnification for reading fine print. Presbyopia is the term that refers to the natural weakening of the focusing muscles that occurs in our early to mid 40s, causing us to need the magnification that reading glasses provide. The LASIK treatment does not correct or prevent presbyopia. We also will be glad to discuss another option called monovision.