To assess the safety, efficacy, stability, and predictability of collagen copolymer
toric phakic intraocular lens (pIOL) implantation to correct myopia and astigmatism
in eyes with keratoconus.
Fernández-Vega Ophthalmological Institute, Oviedo, Spain.
This prospective study comprised keratoconic eyes that had implantation of a toric
Intraocular Collamer Lens. Uncorrected (UDVA) and corrected (CDVA) distance visual
acuities, refraction, and postoperative complications were evaluated 1, 3, 6, and
12 months postoperatively.
Preoperatively, the mean spherical equivalent in the 30 eyes (21 patients) was -5.38
diopters (D) +/- 3.26 (SD) (range -13.50 to -0.63 D) and the mean cylinder, -3.48
+/- 1.24 D (range -1.75 to -6.00 D). At 12 months, 86.7% of the eyes were within +/-0.50
D of the attempted refraction and all eyes were within +/-1.00 D. For the astigmatic
components J0 and J45, 83.3% of eyes and 86.7% of eyes, respectively, were within
+/-0.50 D. The mean Snellen UDVA was 0.81 +/- 0.20 and the mean CDVA, 0.83 +/- 0.18;
CDVA was 20/40 or better in 29 eyes 96.7% of eyes and 20/25 or better in 22 eyes (73.3%).
No eyes lost more than 2 lines of CDVA; 29 eyes (96.7%) maintained or gained 1 or
more lines. The efficacy index was 1.07 and the safety index, 1.16. There were no
complications or adverse events.
The results confirm that toric ICL implantation is a predictable, effective procedure
to correct ametropia in eyes with keratoconus. Predictability and stability were achieved
early and remained fairly stable up to 12 months.
(c) 2010 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.