This exhibit compares proper and improper performance of a LASIK procedure. LASIK, Laser Assisted In Situ Keratomileusis, is a type of refractive eye surgery used to correct visual deficits such as myopia, hyperopia, and astigmatism. This is accomplished by opening a flap in the anterior cornea and reshaping corneal tissue to improve the focus of light into the eye. When executed correctly, the area of reshaped corneal tissue is the same as the size of the patient’s pupil. When performed improperly, the area of reshaped tissue is smaller than the patient’s pupil, allowing light to enter the eye through both the corrected and uncorrected cornea. This can result in visual side effects such as: "halos" (glaring) around light sources at night, blurriness, and light sensitivity.