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Three-year follow-up of posterior chamber toric phakic intraocular lens implantation for the correction of high myopic astigmatism in eyes with keratoconus
  1. Kazutaka Kamiya1,
  2. Kimiya Shimizu1,
  3. Hidenaga Kobashi1,
  4. Akihito Igarashi1,
  5. Mari Komatsu2,
  6. Akio Nakamura3,
  7. Takashi Kojima4,
  8. Tomoaki Nakamura4
  1. 1Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa, Japan
  2. 2Sanno Hospital, Tokyo, Japan
  3. 3Nakamura Eye Clinic, Ibaraki, Japan
  4. 4Nagoya Eye Clinic, Aichi, Japan
  1. Correspondence to Dr Kazutaka Kamiya, Department of Ophthalmology, University of Kitasato School of Medicine, 1-15-1 Kitasato, Sagamihara, Kanagawa 252-0374, Japan; kamiyak-tky{at}umin.ac.jp

Abstract

Aim To assess the clinical outcomes following the use of toric implantable collamer lenses (toric ICL, STAAR Surgical) for the correction of high myopic astigmatism with keratoconus.

Methods This retrospective study evaluated 21 eyes of 11 patients with spherical equivalents of −9.70±2.33 D (mean±SD) and astigmatism of −3.21±1.56 D who underwent toric ICL implantation for keratoconus. Preoperatively, and at 1, 3 and 6 months and 1, 2 and 3 years postoperatively, we assessed the safety, efficacy, predictability, stability and adverse events of the surgery.

Results The logarithm of the minimum angle of resolution (logMAR) uncorrected distance visual acuity (UDVA) and the logMAR corrected distance visual acuity (CDVA) were −0.06±0.11 and −0.12±0.09, respectively, at 3 years postoperatively. At 3 years, 67% and 86% of the eyes were within ±0.5 and ±1.0 D, respectively, of the targeted correction. Manifest refraction changes of 0.04±0.33 D occurred from 1 month to 3 years postoperatively. No significant change in manifest refraction (analysis of variance, p=0.989) or keratometry (p=0.951), or vision-threatening complications occurred during the observation period.

Conclusions Toric ICL implantation is beneficial according to measures of safety, efficacy, predictability and stability for the correction of refractive errors for keratoconus during a 3-year observation period. The disease did not progress even in the late-postoperative period, suggesting the viability of this procedure as a surgical option for the treatment of such eyes.

  • Treatment Surgery

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