Influence of trifocal intraocular lenses on standard automated refraction and aberrometer-based automated refraction



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Garzón Jiménez, Nuria and García Montero, María and López Artero, Esther and Poyales Galán, Francisco and Albarrán Diego, Cesar Antonio (2019) Influence of trifocal intraocular lenses on standard automated refraction and aberrometer-based automated refraction. Journal of Cataract & Refractive Surgery . ISSN 1873-4502 (In Press)

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Purpose: To study the agreement between manifest refraction (Rx) and objective refraction (ObjRx) measured with two autorefractor models and an aberrometer, in eyes implanted with a trifocal diffractive intraocular lens.
Setting: IOA Madrid Innova Ocular, Madrid, Spain.
Design: Prospective comparative cohort study.
Methods: A Topcon KR8800 autorefractor, based on a Scheiner double-pinhole, and a NIDEK OPD-SCAN III aberrometer, based on the scanning-slit retinoscopy principle, were used to obtain objective refraction (ObjRx) readings. In addition, lower-order Zernike coefficients (Z) were used to calculate ObjRx.

A set of 7 different results in power vector notation [M(spherical equivalent), J0 and J45] for 7 different methods was obtained: Rx, AR (automated refraction obtained with the KR8800), WF-P (Z-based ObjRx for the photopic pupil), WF-M (Z-based ObjRx for the mesopic pupil), WF-4 (Z-based ObjRx for a 4 mm pupil), OPD-C (automated refraction measured with the OPD under photopic conditions), and OPD-M (automated refraction measured with the OPD under mesopic conditions).
Results: The study comprised 102 eyes from 51 cataract patients who underwent binocular implantation of the POD F IOL. All 6 objective methods yielded more negative M values than manifest refraction (Rx) (p < 0.001). As for the astigmatism components (J0 and J45), only AR (p = 0.003) and OPD-M (p < 0.001) differed significantly from Rx. The best and worst correlation for the M component were ICC=0.70 (for WF-M) and ICC=0.48 (WF-4).
Conclusions: Objective methods tend to yield more negative sphere values than manifest refraction.

Item Type:Article
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Published online: April 23, 2019; Accepted: April 17, 2019; Received in revised form: April 16, 2019; Received: December 28, 2018

Uncontrolled Keywords:Intraocular lenses; Refraction; Aberrometer; Trifocal intraocular lenses; Objetive refraction; Autorefractor models
Subjects:Medical sciences > Optics > Optometry
Medical sciences > Optics > Visual perception
ID Code:56219
Deposited On:09 Sep 2019 12:30
Last Modified:23 Apr 2020 23:01

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