Laser vision correction is a procedure that improves vision by permanently changing the shape of the cornea (the clear covering of the front of the eye) with a laser. Often referred to as LASIK, it is the most commonly performed type of laser procedure and an effective treatment for a wide range of vision problems.

There are two variables that can be altered to achieve clear vision: changing the light as it enters the eye, and altering the front curve of the eye.

For centuries directing light rays with lenses has obtained clear vision. Glass or plastic lenses bend light the exact amount required to change the focal point to match the length of the eye, producing clear vision. Later, contact lenses were used to achieve the same result.

Researchers have been trying for decades to come up with a more permanent solution to create clear vision. Early research led to the development of several surgical procedures such as Radial Keratotomy (RK). Those procedures offered some improvements, but were limited in the degree of correction possible. With the advent of the excimer laser, more precise vision correction procedures such as Photorefractive Keratectomy (PRK), Laser in Situ Keratomileusis (LASIK) and Laser Assisted Sub-Epithelial Keratectomy (LASEK) were developed.