Comparison of Clinical Results of LASIK with Different Flap Thicknesses.

Kwon, Sangwon; Lee, Jong Hyuk; Shyn, Kyung Hwan

Original Article

Journal of the Korean Ophthalmological Society 2004;45(5):811-816.
Published online May 1, 2004.

Comparison of Clinical Results of LASIK with Different Flap Thicknesses.

Sangwon Kwon, Jong Hyuk Lee, Kyung Hwan Shyn

Department of Ophthalmology, Gachon Medical school, Ghil Medical Center, Inchon, Korea. khshyn@ghil.com

LASIK 수술에서 각막절편의 두께에 따른 임상 결과 비교

권상원 ( Kwon Sang Won ) , 이종혁 ( Lee Jong Hyeog ) , 신경환 ( Sin Gyeong Hwan )

Abstract

PURPOSE
To evaluate the effect of corneal flap thickness on visual prognosis and complications in LASIK. METHODS: A total of 251 eyes of 129 patients who had been followed up for 6 months or more after LASIK were evaluated retrospectively. The eyes were classified into two groups: group A of 34 eyes with corneal flap thickness of 100 m or less and group B of 217 eyes with corneal flap thickness of more than 100 m. Clinical outcomes, including uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), spherical equivalent (SE), myopic regression and complications, were compared between the two groups. RESULTS: In groups A and B, UCVA improved from 0.08 +/- 0.04 and 0.08 +/- 0.02 before surgery to 0.84 +/- 16 and 0.88 +/- 21 6 months after surgery, and SE changed from -6.36 +/- 2.46D and 6.07 +/- 2.81D to 0.29 +/- 0.72D and -0.17 +/- 0.81D 6 months after surgery, respectively, but there were no statistically significant differences between the two groups. BCVA, myopic regression and the incidence of complications also did not show any statistical difference. CONCLUSIONS: LASIK can be performed safely under thin corneal flaps of 100 m or less to leave enough residual corneal thickness.

Key Words: Flap thickness;LASIK