WHAT EXACTLY IS LASIK SURGERY?
LASIK is the acronym for Laser-Assisted in Situ Keratomileusis. LASIK is a cosmetic operation. An ultraviolet excimer laser is used to modify the curve of the cornea in order to change the basic focus of the eye. This will supposedly “cure” refractive errors of the eye – nearsightedness, farsightedness, and astigmatism – and thereby eliminate the need for distance glasses in some people.
LASIK surgeons begin by flattening the eye with a suction ring. This squashes the eye as if it is being squeezed in a vise. The pressure inside the eye temporarily shoots up to sixty, where normal is between eight and twenty-two. They then slice a flap off the flattened surface of the cornea, just as if they were cutting a slice off a loaf of bread. Then the surgeons use the excimer laser to shave the cornea underneath the flap, thereby changing its curvature. Finally, they place the flap back on the eye, and trust it will seal itself back onto the cornea again.