gms | German Medical Science

34th Congress of the German Society for Cataract & Refractive Surgeons (GSCRS)

German Society for Cataract & Refractive Surgeons (GSCRS)

13.02. - 15.02.2020, Mainz

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Determining and comparing the effective lens position and refractive outcome of a novel capsulotomy lens to established lens designs

Meeting Abstract

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  • Mehdi Shajari - München; Frankfurt a.M.
  • R. Sonntag - München
  • D. Holland - Kiel
  • S. Priglinger - München
  • T. Kohnen - Frankfurt a.M.
  • W. Mayer - München

Deutschsprachige Gesellschaft für Intraokularlinsen-Implantation, Interventionelle und Refraktive Chirurgie. 34. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie. Mainz, 13.-15.02.2020. Düsseldorf: German Medical Science GMS Publishing House; 2020. Doc20dgii61

doi: 10.3205/20dgii61, urn:nbn:de:0183-20dgii614

Published: June 18, 2020

© 2020 Shajari et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. See license information at http://creativecommons.org/licenses/by/4.0/.

Outline

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Purpose: To evaluate differences in effective lens position (ELP) based on the lens design. Intraocular lenses (IOL) with plate-haptic, c-loop haptic and a rhexis fixated lens were compared.

Setting/Venue: Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany. Department of Ophthalmology, Goethe-University, Frankfurt, Germany. nordBlick Eye Clinic, Kiel, Germany.

Methods: The study included patients having age-related cataract surgery with implantation of either a plate-haptic, c-loop haptic or a novel rhexis fixated IOL. Biometry and refraction measurements were conducted pre- and three months postoperatively. Lens constant optimization was performed.

Results: Seventy eyes of 56 subjects were included. ELP for rhexis fixated IOL was shortest (4.29±0.24mm), followed by c-loop haptic (4.41±0.42mm) and plate-haptic (4.51±0.26mm) IOL. Difference in ELP was significant between rhexis fixated IOL and both plate-haptic (P=0.001) and c-loop haptic IOL (P=0.000). ACD adjustment based on lens design showed a significant effect on refraction and IOL power predictions for all formulas and lenses (P<0.05). For the rhexis fixated IOL the differences in refraction ranged from +0.04D for the Hill-RBF to +0.096D for Haigis. The other two lenses showed mean differences in refraction between -0.046D for Hill-RBF.

Conclusions: The difference in IOL fixation and its resulting position in the capsular bag have a significant effect on the effective lens position and consequently a significant effect on the prediction of postoperative refraction.