The PRK procedure involves removing the surface cells prior to treatment with the laser. The surface cells the grow back over the next 3 to 4 days and form a healing line. As the healing line smooths out vision improves. Rarely, the healing line can fall directly in the center of vision in both eyes and the patient can have 20/40 vision until it smooths out. Fortunately, 20/40 vision is sufficient to drive and go to work but it is still annoying. The healing line almost always resolves by two weeks after surgery. Contact Kornmehl Laser Eye Associates for more information.