May 16, 2004
Treatment of Previous Decentered Excimer Laser Ablation With Combined Myopic and Hyperopic Ablations
Journal of Refractive Surgery Vol. 20 No. 2 March/April 2004
To recenter the ablation zone without changing the refraction, a combination myopic and hyperopic treatment was used. The hyperopic treatment was decentered toward the initial decentered myopic ablation. A myopia ablation of near equal dioptric value was then added, but decentered in the opposite direction. The Bausch & Lomb Technolas Keracor 217 laser was used.After the first retreatment, the centration of the ablation zone was improved in 15 of the 16 eyes. All eyes with initial spectacle-corrected visual acuity loss recovered lines of visual acuity. Subjective decrease of symptoms was described as follows: nil in one eye, mild in one eye, moderate in four eyes, and marked in ten eyes. A second retreatment was needed in five eyes: in two to improve centration and in three to correct residual ametropia. The only complication (one eye) was induced decentration 180° away from the initial decentration with a 1-line spectacle-corrected visual acuity loss, and additional retreatment was required.CONCLUSIONA combination of decentered myopic and hyperopic ablation of an equivalent dioptric magnitude, each decentered 180° apart, was a useful method to correct previous excimer laser treatment decentration, with minimal alteration of refractive status that was obtained by the initial surgery.
Posted by mehdi khanlari at May 16, 2004 09:15 PM