Laser Eye Surgery for Blurred Vision

Most of the eye's optical focusing power is provided by the cornea.  The cornea is the transparent "window" at the front of the eye, and it focuses light rays onto the retina, which is the nerve layer at the back of the eye. If the optical system of the eye works just right, then the image formed on the retina is sharp, and the eye should be able to see "20/20" vision without the need for glasses.

On the other hand, if the optical system of the eye is imperfect, the image formed on the retina is not sharp, and the result is blurred vision. By far the most common conditions causing this are myopia, hypermetropia, or astigmatism. These are termed refractive errors of the eye, which simply means that the refracting (focusing) system of the eye is imperfect.

Refractive surgery is any surgical procedure aimed at correcting a refractive error. Laser vision correction is the most popular type of refractive surgery nowadays. Other types refractive surgery, that do not involve a laser, include radial keratotomy, lens implants, and conductive keratoplasty.

Refractive surgery works by altering the optical focusing properties of the eye, either by altering the curvature of the cornea, or by implanting a lens inside the eye.