Mechanism of action of the tetraflex accommodative intraocular lens

Journal of Refractive Surgery
J S WolffsohnSunil Shah

Abstract

To investigate the mechanism of action of the Tetraflex (Lenstec Kellen KH-3500) accommodative intraocular lens (IOL). Thirteen eyes of eight patients implanted with the Tetraflex accommodating IOL for at least 2 years underwent assessment of their objective amplitude-of-accommodation by autorefraction, anterior chamber depth and pupil size with optical coherence tomography, and IOL flexure with aberrometry, each viewing a target at 0.0 to 4.00 diopters of accommodative demand. Pupil size decreased by 0.62 ± 0.41 mm on increasing accommodative demand, but the Tetraflex IOL was relatively fixed in position within the eye. The ocular aberrations of the eye changed with increased accommodative demand, but not in a consistent manner among individuals. Those aberrations that appeared to be most affected were defocus, vertical primary and secondary astigmatism, vertical coma, horizontal and vertical primary and secondary trefoil, and spherical aberration. Some of the reported near vision benefits of the Tetraflex accommodating IOL appear to be due to changes in the optical aberrations because of the flexure of the IOL on accommodative effort rather than forward movement within the capsular bag.

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Citations

May 4, 2011·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·James S WolffsohnLeon N Davies
Sep 24, 2011·Journal of Ophthalmology·Ioannis G PallikarisDimitra M Portaliou
Jan 16, 2014·Journal of Cataract and Refractive Surgery·Anish DhitalKavita B Gala
Aug 10, 2013·Zeitschrift für medizinische Physik·Melanie GillnerAchim Langenbucher
Mar 12, 2013·Zeitschrift für medizinische Physik·Timo EppigAchim Langenbucher
Apr 7, 2010·Journal of Cataract and Refractive Surgery·Thomas Kohnen
Oct 17, 2015·Journal of Cataract and Refractive Surgery·Gregory D KramerNick Mamalis
Feb 18, 2014·American Journal of Ophthalmology·Pablo Pérez-MerinoSusana Marcos
Jun 27, 2017·Asia-Pacific Journal of Ophthalmology·Jay S PeposeMujtaba Qazi
Sep 6, 2018·Applied Optics·Lan Zeng, Fengzhou Fang
Sep 23, 2016·Current Opinion in Ophthalmology·Jay S PeposeMujtaba A Qazi
Dec 25, 2010·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Amy L SheppardLeon N Davies
Jul 5, 2017·Eye and Vision·Jorge L AlióAlfredo Vega-Estrada

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