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Although PRK and LASIK caused visual disturbances and dry eye symptoms early after the procedures in a comparison, PRK produced more visual distrubances than LASIK.
They conducted a prospective, randomized comparison of the postoperative dry eye symptoms, severity, foreign body sensation, and visual fluctuations in patients with myopia who underwent LASIK and those who underwent PRK. The study included 68 eyes of 34 subjects. One eye of each patient was treated with wavefront-guided LASIK and the fellow eye was treated with wavefront-guided PRK. Eyes were randomly assigned based on ocular dominance. Patients completed questionnaires preoperatively and again postoperatively at 1, 3, 6, and 12 months.