Abstract

PURPOSE
To evaluate the long-term outcomes of aspheric corneal wavefront ablation profiles for excimer laser retreatment.
METHODS
Eighteen eyes that had previously undergone LASIK or photorefractive keratectomy (PRK) were retreated with LASIK using the corneal wavefront ablation profile. Custom Ablation Manager (SCHWIND eye-tech-solutions, Kleinostheim, Germany) software and the ESIRIS flying spot excimer laser system (SCHWIND) were used to perform the ablations. Refractive outcomes and wavefront data are reported up to 4 years after retreatment. Pre- and postoperative data were compared with Student t tests and (multivariate) correlation tests. P<.05 was considered statistically significant. A bilinear correlation of various postoperative wavefront aberrations versus planned correction and preoperative aberration was performed.
RESULTS
Mean manifest refraction spherical equivalent (MRSE) before retreatment was -0.38±1.85 diopters (D) and -0.09±0.22 D at 6 months and -0.10±0.38 D at 4 years postoperatively. The reduction in MRSE was statistically significant at both postoperative time points (P<.005). Postoperative aberrations were statistically lower (spherical aberration P<.05; coma P<.005; root-mean-square higher order aberration P<.0001) at 4 years postoperatively. Distribution of the postoperative uncorrected distance visual acuity (P<.0001) and corrected distance visual acuity (P<.01) were statistically better than preoperative values.
CONCLUSIONS
Aspheric corneal wavefront customization with the ESIRIS yields visual, optical, and refractive results comparable to those of other wavefront-guided customized techniques for the correction of myopia and myopic astigmatism. The corneal wavefront customized approach shows its strength in cases where abnormal optical systems are expected. Systematic wavefront customized corneal ablation appears safe and efficacious for retreatment cases.

Links

Aggregator Full Text

Authors

Aslanides IM, Kolli S, Padron S, Arba Mosquera S

Institution

Emmetropia Mediterranean Eye Clinic, Crete, Greece.

Source

Journal of refractive surgery (Thorofare, N.J. : 1995) 28:5 2012 May pg 347-52

MeSH

Adult
Astigmatism
Corneal Topography
Corneal Wavefront Aberration
Follow-Up Studies
Humans
Keratomileusis, Laser In Situ
Lasers, Excimer
Middle Aged
Refraction, Ocular
Reoperation
Retrospective Studies
Treatment Outcome
Visual Acuity

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22515177