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Early clinical outcomes of implantation of posterior chamber phakic intraocular lens with a central hole (Hole ICL) for moderate to high myopia
  1. Kimiya Shimizu,
  2. Kazutaka Kamiya,
  3. Akihito Igarashi,
  4. Tetsu Shiratani
  1. Department of Ophthalmology, Kitasato University School of Medicine, Kanagawa Japan
  1. Correspondence to Professor Kimiya Shimizu, Department of Ophthalmology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0374, Japan; kimiyas{at}


Aim To assess the early clinical outcomes of an ICL with a central hole (Hole ICL) implantation for the correction of moderate to high myopia.

Methods This study evaluated 20 eyes of 20 patients with spherical equivalents of −7.36±2.13 D (mean±SD) who underwent Hole ICL implantation. Before surgery and at 1 week and 1, 3 and 6 months after surgery, we assessed the safety, efficacy, predictability, stability and adverse events of the surgery.

Results Logarithm of the minimum angle of resolution (logMAR) uncorrected visual acuity and logMAR best spectacle-corrected visual acuity were −0.20±0.12 and −0.25±0.06, respectively, 6 months after surgery. The safety and efficacy indices were 1.13±0.24 and 1.03±0.30, respectively. At 6 months, 95%, and 100% eyes were within ±0.5 and ±1.0 D of the targeted correction, respectively. Change in manifest refraction from week 1 to month 6 was 0.06±0.28 D. No significant rise in intraocular pressure (including pupillary block) or a secondary cataract occurred in any case during the period of observation.

Conclusions Implantation of a newly developed Hole ICL offered good results for all measures of safety, efficacy, predictability and stability for the correction of moderate to high myopic errors, even without peripheral iridectomy, suggesting its viability as a surgical option for the treatment of such eyes.

  • Hole ICL
  • phakic IOL
  • myopia
  • posterior chamber

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  • Funding KS is a consultant to STAAR Surgical. No other financial interest exists.

  • Competing interests None.

  • Patient consent Obtained.

  • Ethics approval The study was approved by the Institutional Review Board at Kitasato University School of Medicine, and followed the tenets of the Declaration of Helsinki.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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