J Korean Ophthalmol Soc.  2001 Jul;42(7):960-966.

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

• Lee HH
• Shin MC
• Lee HB

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.

Keyword

LASIK; Laser in situ keratomileusis; Corrected visual acuity; Corneal topography

MeSH Terms

Classification
Corneal Topography*
Female
Humans
Keratomileusis, Laser In Situ
Lasers, Excimer
Male
Myopia
Refractive Surgical Procedures
Visual Acuity