Laser in situ keratomileusis to manage refractive errors after deep anterior lamellar keratoplasty
Banu Torun Acar, MD, Canan A. Utine, MD, MSc, Suphi Acar, MD, Ferda Ciftci, MD
To analyze the visual and refractive outcomes of laser in situ keratomileusis (LASIK) after deep anterior lamellar keratoplasty (DALK) for keratoconus.
Haydarpasa Numune Education and Research Hospital, Ophthalmology Clinic, Istanbul, Turkey.
Patients with compound myopic astigmatism after DALK and a spherical equivalent (SE) between −2.50 diopters (D) and −8.00 D had LASIK as a single-step procedure, correcting the manifest refraction error. The visual and refractive results at 1 month, 3 months, and the last follow-up were compared with preoperative values.
The mean follow-up was 11.17 months ± 3.61 (SD). The mean manifest refraction SE (MRSE) and autorefractometer measurements and the autokeratorefractometer and corneal topography keratometry readings decreased significantly from preoperatively to 1 month postoperatively (P<.01) but did not change significantly thereafter (P>.05). Preoperatively, the mean uncorrected (UDVA) and corrected (CDVA) distance visual acuities were 0.21 ± 0.08 and 0.73 ± 0.08, respectively; postoperatively, the means were 0.73 ± 0.10 and 0.98 ± 0.05, respectively. All eyes achieved a postoperative UDVA better than 0.5. No eye lost CDVA lines. The safety index was 1.34. The mean MRSE was −5.18 ± 1.74 D preoperatively and −1.05 ± 0.64 D postoperatively (P<.01). Postoperatively, 11 eyes (91.67%) were within ±2.00 D of the SE, 8 (6.67%) were within ±1.00 D, and 5 (41.67%) were within ±0.50 D. No complications were encountered.
Treatment of post-DALK keratoconus patients with LASIK to correct manifest refraction error seems to be a viable option.