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

Session Details

Session Title: Presented Poster Session: Enlarged Depth of Focus vs Multifocal IOLs

Venue: Poster Village: Pod 1

First Author: : N.Garzón SPAIN

Co Author(s): :    C. Albarrán-Diego   M. García-Montero   E. López-Artero   F. Poyales              

Abstract Details

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, Spain.

Methods:

An autorefractor, based on a Scheiner double-pinhole, and an aberrometer, based on the scanning-slit retinoscopy principle, were used to obtain objective refraction (ObjRx) readings. Lower-order Zernike coefficients 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  with the autorefractor), 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 aberrometer under photopic conditions),  OPD-M (automated refraction measured with aberrometer 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.

Financial Disclosure:

None