Why is Laser Refractive Surgery necessary?
A laser can be used to treat vision problems caused by refractive errors. You have a refractive error when your eye does not refract (bend) light properly. To see clearly, light rays must be refracted by your cornea and lens. The light focuses on the retina which turns light into signals that travel to your brain and become images. With refractive errors, the shape of your cornea or lens keeps light from bending properly.