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Goldmann discrepancies found after LASIK in patients with thick corneas

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CHARLESTON, S.C. — Patients with thick corneas who undergo LASIK have greater discrepancies in Goldmann tonometer measurements postoperatively than patients with thinner corneas, according to a presentation here.

In a poster at the American Glaucoma Society meeting, Nina A. Goyal, MD, compared preop and postop Goldmann applanation tonometry readings in patients undergoing refractive surgery for myopia. She found inconsistencies between the preop and postop readings, with lower IOPs postoperatively in the patients with thicker corneas.

“It was the people with the thick corneas … who had the biggest discrepancies,” Dr. Goyal said. “If you’re going to do LASIK on these patients, and they’re glaucoma suspects, and you’re getting pressures of 12, you might be lulled into thinking that that’s an OK pressure for them. But we found these are the people you probably want to watch. It’s counterintuitive, and we don’t know why.”