(Top) Method of measuring corneal flap thickness with anterior segment optical coherence tomography (OCT). Flap thickness was measured at the flap center, 1.5-mm zone (inner circle), and 3.0-mm zone (intermediate circle) along a 45° (including 225°) meridian and a 135° (including 315°) meridian from the flap center, for a total of 10 points. (Bottom) Measurement of a 120-μm flap thickness setting at 1 week postoperatively.
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