TY - JOUR
T1 - Mechanism of action of the tetraflex accommodative intraocular lens
AU - Wolffsohn, James S.W.
AU - Davies, Leon N.
AU - Gupta, Navneet
AU - Naroo, Shehzad A.
AU - Gibson, George A.
AU - Mihashi, Toshifumi
AU - Shah, Sunil
N1 - © Slack Incorporated. Republication prohibited elsewhere.
PY - 2010/11/1
Y1 - 2010/11/1
N2 - 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.
AB - 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.
KW - Tetraflex
KW - Lenstec Kellen
KW - KH-3500
KW - accommodative intraocular lens
KW - IOL
UR - http://www.scopus.com/inward/record.url?scp=77950163850&partnerID=8YFLogxK
UR - http://www.journalofrefractivesurgery.com/showabst.asp?thing=60050
U2 - 10.3928/1081597X-20100114-04
DO - 10.3928/1081597X-20100114-04
M3 - Article
SN - 1081-597X
VL - 26
SP - 858
EP - 862
JO - Journal of Refractive Surgery
JF - Journal of Refractive Surgery
IS - 11
ER -