Seeing
“Seeing” involves more than simply looking at an object. Vision is a complex process in which light waves entering the eye are directed toward the retina, where they are transduced into messages the brain can understand. Flaws in the clear outer layer of the eye, the cornea, are primarily to blame for so many people (about a third of the American population) needing glasses or contact lenses (National Eye Institute, n.d.-a). LASIK eye surgery, a popular alternative to corrective lenses, uses a laser to reshape the cornea so that it can focus light properly.
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