July 21, 2003
Laser in situ Keratomileusis for Correction of Induced Astigmatism From Cataract Surgery
Journal of Refractive Surgery Vol. 19 No. 4 July/August 2003
Hamid Norouzi, MD; Mohsen Rahmati-Kamel, MD
LASIK was performed on 20 eyes of 20 patients with refractive myopic or mixed astigmatism (3.00 to 6.00 D) at least 1 year after extracapsular cataract extraction with posterior chamber intraocular lens implantation without complication. Each eye received bitoric LASIK with the Nidek EC-5000 excimer laser and the Automated Corneal Shaper microkeratome.At 6 months after LASIK, mean refractive cylinder decreased from 4.64±0.63 D to 0.44±0.24 D (P<.001). Mean percent reduction of astigmatism was 90.4±5.0% (range 80% to 100%). Mean spherical equivalent refraction decreased from -2.19±0.88 D (range -1.00 to -3.88 D) to -0.32±0.34 D (range -1.25 to +0.38 D) (P<.001). Vector analysis showed that the mean amount of axis deviation was 0.7±1.2° (range 0° to 4.3°) and the mean percent correction of preoperative astigmatism was 92.1±5.9% (range 85.6% to 108%). Eighty-five percent of all eyes had a mean spherical equivalent refraction and mean cylinder within ±0.50 D of emmetropia. Change in spherical equivalent refraction and cylinder from 2 weeks to 6 months was .0.50 D in 90% (18 eyes) and 95% (19 eyes), respectively. Spectacle-corrected visual acuity was not reduced in any eye. Diffuse lamellar keratitis occurred in three eyes (15%) after LASIK, and were treated successfully with eyedrops.LASIK was an effective, predictable, stable, and safe procedure for correction of residual myopic or mixed astigmatism ranging from 3.00 to 6.00 D with a low spherical component after cataract surgery.
Posted by mmiraftab at July 21, 2003 10:58 PM