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2013 ASCRS•ASOA San Francisco Daily News Tuesday

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8 EW SHOW DAILY Tuesday, April 23, 2013 ASCRS Symposia Symposium presents best of military refractive meeting by Jena Passut EyeWorld Editor S peakers from January's International Military Refractive Surgery Symposium in San Antonio came together again to present the best of the meeting's invited papers, free papers, and grand rounds at an ASCRS symposium. The symposium was moderated by representatives from the three major branches of the military— Navy Capt. Elizabeth M. Hofmeister, MD, San Diego; Air Force Maj. Vasudha A. Panday, MD, San Antonio; and Col. Mark F. Torres, MD, Tacoma, Wash. As part of the best free papers, retired Navy Capt. Steve C. Schallhorn, MD, San Diego, presented data from an analysis of more than 32,000 laser vision correction patients and reported that statistical modeling only explains 2% of postoperative dry eye variance. "Our ability to predict who will have mild to moderate dry eye after surgery is very, very, very limited," he said. "Two percent is worse than flipping a coin." Air Force Maj. Vasudha A. Panday, MD, speaks at the symposium. Conventional wisdom that says PRK is a better surgery for dry eye patients than LASIK is flawed, Dr. Schallhorn said. According to the data presented at the meeting, the researchers analyzed three-month postop questionnaires where patients who received LASIK or PRK between January 2010 and December 2011 reported dry eye symptoms. Preop parameters that were looked at were age, gender, geographic location, refraction, tear break-up time, and tear film quality. Univariate, multiregression, and generalized and ordered linear regression models were used to develop preop predictors of dry eye symptoms. The researchers found that there was more incidence of dry eye in the PRK patients. "Don't think that LASIK will solve the problem," Dr. Schallhorn said. Dr. Schallhorn also said that there are seasonal variations for dry eye, with more symptoms appearing in the winter. Gary L. Legault, MD, presented three Army cases for "Military Experience with Femtosecond Astigmatic Keratotomy" including two post-PKP and one high astigmatism. One patient, an 80-year-old who couldn't tolerate the hard contact lenses, was particularly happy with his surgical results. "It had a huge impact for this patient," Dr. Legault, adding that surgeons "continue to find better ways to correct astigmatism." During an audience question portion, an attendee inquired about the possibility of regression, which panelists said does occur. "We correct with spectacles or contact lenses, so they're very happy," said Dr. Panday. EW Editors' note: Dr. Schallhorn is the global medical director for Optical Express, and he has financial interests with Abbott Medical Optics (Santa Ana, Calif.). The other panelists have no related financial interests.

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