Abstract

DO.12.01

Influence of geometry on capsular stability of hydrophilic acrylic intraocular lenses

Wirbelauer C., Aurich H., Häberle H., Pham D. T.
Klinik für Augenheilkunde, Vivantes Klinikum Neukölln, Berlin

Objective: The purpose of this experimental and clinical study was to evaluate the influence of geometriy on capsular stability of hydrophilic acrylic intraocular lenses (IOL).
Methods: Two CE-certified, one-piece hydrophlic acrylic IOL were studied. The main difference in geometry was the angulation of the haptic of 10° (L-305, Oculentis) and 0° (L-302-1, Oculentis). Laboratory studies were performed under standardized conditions (DIN EN ISO 11979-3) to assess the biomechanics of the IOL. Clinically the IOL were implanted in two groups of 50 patients and observed after a follow-up of more than 6 weeks.
Results: The biomechanical evaluation revealed a mean axial shift of 1,54 mm (L-305) and 0,9 mm (L-302-1), an optic decentration of 0,63 mm and 0,15 mm, and an optic tilting of 6,6° and 2,6°. All parameters of the model without haptic angulation (L-302-1) were within the DIN specifications (P<0,05). The clinical experiences confirmed the improved capsular stability compared to the model with an angulation of 10°.
Conclusions: This study showed that the geometry exerted a relevant infuence on the biomechanical stability of IOL made of hydrophilic acrylic. Changes in haptic angulation allowed improvements of the biomechanical adapatability to compression forces and capsular stability.

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