Corneal Flap Thickness according to Suction Time of Microkeratome in Porcine Eye.

Kook, Koung Hoon; Seo, Kyoung Yul; Kim, Moon J; Kim, Eung Kweon

Randomized Controlled Trial

Journal of the Korean Ophthalmological Society 2002;43(7):1133-1137.
Published online July 1, 2002.

Corneal Flap Thickness according to Suction Time of Microkeratome in Porcine Eye.

Koung Hoon Kook, Kyoung Yul Seo, Moon J Kim, Eung Kweon Kim

The Institute of Vision Research Department of Ophthalmology, College of Medicine, Yonsei University, Seoul, Korea. eungkkim@yumc.yonsei.ac.kr

돼지안에서 미세각막절삭기의 흡입시간에 따른 각막절편의 두께 변화

국경훈 ( Koung Hoon Kook ) , 서경률 ( Kyoung Yul Seo ) , 김문정 ( Moon J. Kim ) , 김응권 ( Eung Kweon Kim )

Abstract

PURPOSE
The purpose of this study is to investigate the effect of the suction time in forming the corneal flap with microkeratome on the corneal flap thickness. METHODS: Thirty porcine eyes were randomly assigned into 3 groups according to suction duration: group 1(10 sec), group 2(35 sec) and group 3(60 sec). The Hansatome microkeratome with 160 plate and a suction ring with 8.5mm diameter were used to create corneal flap. The thickness of central cornea was measured with automated ultrasound pachymeter before the procedure. And after making the flap, the remained corneal thickness was measured with the same method. Then, the difference between the two values was thought to be the corneal flap thickness. RESULTS: The mean corneal flap thickness in group1, 2, and 3 were 91.0+/-24.1 micromiter, 110.1+/-8.9 mu m and 127.2+/-6.1 mu m, respectively. The difference was significant among the three groups(p=0.010), and the longer suction duration made the flap thicker. CONCLUSIONS: These results suggest that in forming the corneal flap with microkeratome, the suction duration has an effect on the corneal flap thickness and an increase of suction duration makes the flap thicker in porcine eyes.

Key Words: Corneal flap thickness;Laser in situ Keratomileusis(LASIK);Suction duration