LASIK Subjects are individuals who have undergone a laser eye surgery procedure known as LASIK, which stands for Laser-Assisted In Situ Keratomileusis. This type of surgery is used to correct vision problems such as nearsightedness, farsightedness, and astigmatism. It involves reshaping the cornea with a laser to improve the eye's ability to focus light onto the retina. The procedure is relatively quick and painless, and the results can be seen almost immediately.