Three Cases of LASIK for Myopia and Astigmatism after Penetrating Keratoplasty

Kang, Sang Hyug; Chung, Eui Sang; Kim, Woo Jung

Abstract

PURPOSE: To report three cases of LASIK (Laser in situ keratomileusis) for myopia and astigmatism after PKP (penetrating keratoplasty).
METHODS
We performed LASIK in three eyes with myopic astigmatism following PKP which could not be corrected with spectacles or contact lens due to high anisometropia and contact lens intolerance. Visual acuity with or without correction, manifest refraction, corneal topography were checked before and after LASIK. The surgical complications were also monitored intraoperatively and postoperatively.
RESULTS
There was no remarkable complications concerning LASIK. Mean follow-up period after LASIK was 8.7 months. Spherical equivalent was reduced from -11.5, -10.3, -5.5 D to -6.5, +0.62, -2.0 D and astigmatism was also reduced from -3.0, -4.5, -8.0 D to -1.0, -1.25, -3.0 D in each case. Uncorrected visual acuity was improved in all three cases and best spectacle-corrected visual acuity was not reduced in all cases. Postoperative corneal topography showed reduced central keratometric powers and astigmatism, but there was a tendency toward irregular astigmatism compared with that of normal LASIK eyes.
CONCLUSIONS
LASIK can be a relatively safe and effective procedure in treating high myopia and astigmatism following PKP when contact lenses are not indicated. Further investigations are required for the timing of surgery, different nomogram compared with normal eyes, tendency toward irregular astigmatism and long-term follow-up results.