Mechanism of action of the tetraflex accommodative intraocular lens

Wolffsohn, James S.W., Davies, Leon N., Gupta, Navneet, Naroo, Shehzad A., Gibson, George A., Mihashi, Toshifumi and Shah, Sunil (2010). Mechanism of action of the tetraflex accommodative intraocular lens. Journal of Refractive Surgery, 26 (11), pp. 1-5. (In Press)

Abstract

PURPOSE:To investigate the mechanism of action of the Tetraflex (Lenstec Kellen KH-3500) accommodative intraocular lens (IOL). METHODS: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. RESULTS: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. CONCLUSIONS: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.

Publication DOI: https://doi.org/10.3928/1081597X-20100114-04
Divisions: Life & Health Sciences > Optometry
Life & Health Sciences > Ophthalmic Research Group
Life & Health Sciences
Life & Health Sciences > Vision, Hearing and Language
Additional Information: © Slack Incorporated. Republication prohibited elsewhere.
Uncontrolled Keywords: Tetraflex,Lenstec Kellen,KH-3500,accommodative intraocular lens,IOL,Ophthalmology,Surgery
Full Text Link: http://www.jour ... asp?thing=60050
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2010-01-15
Accepted Date: 2010-01-15
Authors: Wolffsohn, James S.W. ( 0000-0003-4673-8927)
Davies, Leon N. ( 0000-0002-1554-0566)
Gupta, Navneet
Naroo, Shehzad A. ( 0000-0002-6373-7187)
Gibson, George A.
Mihashi, Toshifumi
Shah, Sunil

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