5 March 2018 Influence of material and haptic design on the mechanical stability of intraocular lenses by means of finite-element modeling
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Abstract
Intraocular lenses (IOLs) are used in the cataract treatment for surgical replacement of the opacified crystalline lens. Before being implanted they have to pass the strict quality control to guarantee a good biomechanical stability inside the capsular bag, avoiding the rotation, and to provide a good optical quality. The goal of this study was to investigate the influence of the material and haptic design on the behavior of the IOLs under dynamic compression condition. For this purpose, the strain–stress characteristics of the hydrophobic and hydrophilic materials were estimated experimentally. Next, these data were used as the input for a finite-element model (FEM) to analyze the stability of different IOL haptic designs, according to the procedure described by the ISO standards. Finally, the simulations of the effect of IOL tilt and decentration on the optical performance were performed in an eye model using a ray-tracing software. The results suggest the major importance of the haptic design rather than the material on the postoperative behavior of an IOL. FEM appears to be a powerful tool for numerical studies of the biomechanical properties of IOLs and it allows one to help in the design phase to the manufacturers.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Laura Remón Martin, Laura Remón Martin, Damian Siedlecki, Damian Siedlecki, Iulen Cabeza-Gil, Iulen Cabeza-Gil, Begoña Calvo, Begoña Calvo, } "Influence of material and haptic design on the mechanical stability of intraocular lenses by means of finite-element modeling," Journal of Biomedical Optics 23(3), 035003 (5 March 2018). https://doi.org/10.1117/1.JBO.23.3.035003 . Submission: Received: 9 October 2017; Accepted: 12 February 2018
Received: 9 October 2017; Accepted: 12 February 2018; Published: 5 March 2018
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