The Analysis of Corneal Topography after Laser in Situ Keratomileusis(LASIK) for Myopic Correction.

Lee, Hyun Hu; Shin, Min Cheol; Lee, Ha Bum

Original Article

Journal of the Korean Ophthalmological Society 2001;42(7):960-966.
Published online July 1, 2001.

The Analysis of Corneal Topography after Laser in Situ Keratomileusis(LASIK) for Myopic Correction.

¹Department of Ophthalmology, Kangdong Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Korea. hblee1@chollian.net
²Department of Ophthalmology, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, Chuncheon, Korea.

근시 교정을 위한 LASIK 수술 후 각막 형태의 변화

이현후(Hyun Hu Lee),신민철(Min Cheol Shin),이하범(Ha Bum Lee)

Abstract

PURPOSE
To investigate the patterns of corneal topography after LASIK METHODS: The author have performed LASIK to correct the myopia of 21 male and 34 female patients. The corneal topography was performed at preoperative state and 2 days, 1, 3, 6, 12months after operation. RESULTS: Differential maps were classified using a standard eight-category classification scheme which were divided into a combined regular group(toric-with-axis, toric-against-axis, homogeneous, focal topographic variant) and a combined irregular group(semicircular, irregularly irregular, central island, keyhole). At 2 days, the distribution of corneal topographic patterns was 61.8% in a combined regular group and 38.2% in a combined irregular group. Of all patterns, the homogeneous pattern was predominant. The best corrected visual acuity was better in a combined regular group than in a combined irregular group which was statistically significant. After postoperative 1 month, most irregular patterns had a change in topography, generally to an optically smoother pattern. CONCLUSIONS: Corneal topography has been established as an invaluable tool for refractive surgery and this analysis allows the recognition of normal and abnormal patterns of ablation following excimer laser surgery.

Key Words: LASIK;Laser in situ keratomileusis;Corrected visual acuity;Corneal topography