Reshaping Vision Instead of using heat to alter tissues like other lasers, an excimer laser beam breaks the bonds that link tissues together with only minimal effect on surrounding tissues. A computer, programmed by the doctor for each person s own correc tion factors, con trols the laser and the reshaping of the cornea. In treating myopia, the laser segment of the procedure starts with a narrow diameter beam. As the laser beam expands or moves, a tiny lens-shaped disc is created. Only a small area in the center of the cornea is treated, essentially producing a concave lens over the visual axis.
Many patients report an immediate improvement within the first day.
For others, vision may be blurry and fluctuate during the healing period. Since an individual s situation, healing powers and tissues are unique, not everyone should expect to achieve full visual correction. People with high to severe levels of myopia or astigmatism may require another procedure to achieve the desired results. People with extremely strong glasses for example, may end up with significant correction, but still need mild to moderate strength lenses part of the time for some activities. An eye shield may be placed on the eye for temporary protection and to keep you from rubbing your eye in your sleep.