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By default, topics are displayed for the last 45 days. Preoperative records and surgical reports were reviewed, and a thorough ophthalmic examination was performed. A total of 37 eyes had a clear- zone size below 2.25 mm. Six eyes were excluded from subsequent analysis due to keratoconus. Although this study was limited to clear zones less than 2.25 mm, the Authors endorse current recommendations that the clear zone should be at least 3.0 mm in diameter.