Effect of microkeratome suction duration on corneal flap thickness and incision angle

Kyoung Yul Seo, Xiu H. Wan, Jae W. Jang, Jae Bum Lee, Moon J. Kim, Eung Kweon Kim

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

PURPOSE: To determine the effect of suction duration on corneal flap thickness and incision angle of the cut margin created by a microkeratome in a porcine eye. METHODS: Thirty porcine eyes were randomly assigned to three groups according to different suction duration: group 1 (10 sec), group 2 (35 sec), and group 3 (60 sec). The Hansatome microkeratome with a #160 plate and 8.5-mm-diameter suction ring was used to create a corneal flap with a diameter of 8.5 millimeters. Corneal flap thickness was measured by automated ultrasonic pachymetry, and the incision angle was assessed by measuring the angle of a sagittal section of the cornea using image analysis software. RESULTS: Mean corneal flap thickness in groups 1 (10 sec), 2 (35 sec), and 3 (60 sec) was 87.8 ± 22.0 μm, 116.0 ± 7.0 μm, and 127.2 ± 16.8 μm, respectively. There was a statistically significant difference between groups 1 (10 sec) and 2 (35 sec) (P=.005) and groups 1 and 3 (P=.004). The mean incision angle in groups 1, 2, and 3 was 34.8 ± 9.0°, 44.4 ± 16.1°, and 48.24 ± 15.3°, respectively. A statistically significant difference was found between groups 1 (10 sec) and 2 (35 sec) (P=.044) and groups 1 (10 sec) and 3 (60 sec) (P < .001). CONCLUSION: In laser in situ keratomileusis in porcine eyes, an increase in suction duration resulted in a thicker flap and greater incision angle.

Original languageEnglish
Pages (from-to)715-719
Number of pages5
JournalJournal of Refractive Surgery
Volume18
Issue number6
Publication statusPublished - 2002 Nov 1

All Science Journal Classification (ASJC) codes

  • Surgery
  • Ophthalmology

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