Many people who are tired of wearing glasses or contact lenses seek the help of refractive surgeons to improve their vision. Refractive surgery improves vision by correcting refractive errors such as nearsightedness (myopia), farsightedness (hyperopia) and astigmatism. A high percentage of patients enjoy 20/20 vision or better after their procedure. Common refractive procedures include LASIK and refractive lensectomy (clear lens replacement or CLR).