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Evaluation of a toric intraocular lens with open-C-loop haptic

Vergleichende Analyse des refraktiven und aberrometrischen Outcome nach Implantation von 2 verschiedenen torischen Intraokularlinen

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Abstract

Purpose

To assess the rotational stability of a single-piece intraocular lens (IOL) with C-loop haptic during the first six postoperative months.

Setting

Department of Ophthalmology, Hietzing Hospital, Vienna, Austria.

Design

Prospective clinical trial.

Methods

This study enrolled consecutive patients with 1.5 diopters (D) or more of preexisting corneal astigmatism having cataract surgery. Patients had phacoemulsification with implantation of the open-C-loop toric IOL Lentis Unico LU-312 T through a 2.5 mm astigmatically neutral incision. Uncorrected distance visual acuity (UDVA) and best corrected visual acuity (BCVA), refraction, keratometry, and the cylinder axis of the toric IOL were measured. Postoperative examinations were scheduled at week 1, month 1, month 3, and month 6.

Results

A total of 60 eyes of 39 patients were evaluated. The mean preoperative refractive astigmatism was 2.82± 1.34 D (SD) and the mean keratometric astigmatism 2.33 ± 1.10 D, respectively. Six months postoperatively the refractive cylinder decreased significantly to 1.12 ± 0.63 D. The mean postoperative UDVA was 79.05 ± 7.48 letters, improving to 83.78 ± 5.60 letters BCVA. The mean IOL rotation was 5.22 ± 5.82° (range: 0.0–32) at month 6 with less than 10° in 88.3 % of eyes. Five eyes needed reoperation due to IOL misalignment.

Conclusions

The Lentis LU-312 T showed some tendency to rotate for up to 6 months. The C-loop design seems to be less suitable for toric IOLs.

Zusammenfassung

Hintergrund

Ziel dieser prospektiven Studie war es, die Rotationsstabilität einer einstückigen Intraokularlinse (IOL) mit C-Loop Haptik während der ersten 6 postoperativen Monate zu untersuchen.

Methode

In diese Studie wurden konsekutiv PatientInnen mit einem präexistierenden Hornhautaustigmatismus von 1,5 Dioptrien (D) oder mehr, die zur Kataraktoperation eingeteilt waren, eingeschlossen. Alle PatientInnen erhielten nach Phakoemulsifikation eine Open-C-Loop torische IOL (Lentis Unico LU 312 T) durch eine astigmatismusneutrale 2,5 mm Inzision. Der unkorrigierte (UDVA) und der bestkorrigierte (BCVA) Visus, Refraktion, Keratometrie und die Achse der torischen IOL wurden in Woche 1, Monat 1, Monat 3 und Monat 6 postoperativ untersucht.

Resultate

60 Augen von 39 PatientInnen wurden ausgewertet. Der durchschnittliche präoperative refraktive Astigmatismus betrug 2,28 D ± 1,34 (SD), der durchschnittliche keratometrische Astigmatismus 2,33 ± 1,10 D. 6 Monate postoperativ reduzierte sich der refraktive Zylinder signifikant auf 1,12 ± 0,63 D. Der durchschnittliche postoperative UDVA betrug 79,05 ± 7,48 Buchstaben, der BCVA 83,78 ± 5,60. Die IOLs rotierten durchschnittlich um 5,22 ± 5,82 Grad (range 0,0 - 32) nach Monat 6, bei 88,3 % der Augen war die Rotation weniger als 10 Grad. 5 Augen mussten aufgrund einer IOL-Dezentrierung re-operiert werden.

Zusammenfassung

DieLentis LU 312 T zeigte bis Monat 6 postoperativ eine gewisse Rotationstendenz. Das C-Loop- Design dürfte für torische IOLs weniger geeingnet sein.

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Authors and Affiliations

  1. Department of Ophthalmology, Hietzing Hospital, Wolkersbergenstraße 1, 1130, Vienna, Austria

    Renate Rubey MD, MBA, Kata Mihaltz MD, PhD, Andreas Scholler MD, Sibylla Richter-Mueksch MD, Saskia Maca MD, Georg Heinze PhD, Birgit Weingessel MD & Pia-Veronika Vécsei-Marlovits MD, MSc, MBA

  2. Karl Landsteiner Institute for Process Optimization and Quality Management in Cataract Surgery, Vienna, Austria

    Renate Rubey MD, MBA, Kata Mihaltz MD, PhD, Sibylla Richter-Mueksch MD, Saskia Maca MD, Georg Heinze PhD, Birgit Weingessel MD & Pia-Veronika Vécsei-Marlovits MD, MSc, MBA

  3. Section for Clinical Biometrics, Medical University of Vienna, Vienna, Austria

    Georg Heinze PhD

Authors
  1. Renate Rubey MD, MBA
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  2. Kata Mihaltz MD, PhD
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  3. Andreas Scholler MD
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  4. Sibylla Richter-Mueksch MD
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  5. Saskia Maca MD
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  6. Georg Heinze PhD
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  7. Birgit Weingessel MD
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  8. Pia-Veronika Vécsei-Marlovits MD, MSc, MBA
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Corresponding author

Correspondence to Birgit Weingessel MD.

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Rubey, R., Mihaltz, K., Scholler, A. et al. Evaluation of a toric intraocular lens with open-C-loop haptic. Spektrum Augenheilkd. 29, 86–91 (2015). https://doi.org/10.1007/s00717-014-0248-z

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  • DOI: https://doi.org/10.1007/s00717-014-0248-z

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