Clinical outcomes of posterior chamber toric phakic intraocular lens implantation for the correction of high myopic astigmatism in eyes with keratoconus: 6-month follow-up.

Abstract

BACKGROUND:

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

METHODS:

This study evaluated 27 eyes of 14 patients with spherical equivalents of -10.11 ± 2.46 D (mean ± standard deviation) and astigmatism of -3.03 ± 1.58 D who underwent toric ICL implantation for mild keratoconus. Before, and 1, 3 and 6 months after surgery, we assessed the safety, efficacy, predictability, stability, and adverse events of the surgery.

RESULTS:

LogMAR uncorrected visual acuity (UCVA) and LogMAR best spectacle-corrected visual acuity (BSCVA) were -0.09 ± 0.16 and -0.15 ± 0.09 respectively, 6 months after surgery. The safety and efficacy indices were 1.12 ± 0.18 and 1.01 ± 0.25. At 6 months, 85% and 96% of the eyes were within ±0.5 and ±1.0 D respectively of the targeted correction. Manifest refraction changes of 0.00 ± 0.35 D occurred from 1 week to 6 months. No vision-threatening complications occurred during the observation period.

CONCLUSIONS:

Toric ICL implantation was good in all measures of safety, efficacy, predictability, and stability for the correction of spherical and cylindrical errors in eyes with early keratoconus throughout the 6-month follow-up period, suggesting its viability as a surgical option for the treatment of such eyes.

• Authors: Kazutaka Kamiya, Kimiya Shimizu, Hidenaga Kobashi, Mari Komatsu, Akio Nakamura, Tomoaki Nakamura, Kazuo Ichikawa
• Journal: Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie (Graefes Arch Clin Exp Ophthalmol) Vol. 249 Issue 7 Pg. 1073-80 (Jul 2011) ISSN: 1435-702X [Electronic] Germany
• PMID: 20953620 (Publication Type: Journal Article)

Topics

• Adult
• Astigmatism (physiopathology, surgery)
• Female
• Follow-Up Studies
• Humans
• Intraocular Pressure
• Keratoconus (physiopathology, surgery)
• Lens Implantation, Intraocular
• Male
• Middle Aged
• Myopia, Degenerative (physiopathology, surgery)
• Phakic Intraocular Lenses
• Posterior Eye Segment (surgery)
• Refraction, Ocular (physiology)
• Treatment Outcome
• Visual Acuity (physiology)