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Depth-of-focus after implantation of spherical or aspheric intraocular lenses in hyperopic and emmetropic patients

Poster Details

First Author: G.Steinwender AUSTRIA

Co Author(s):    S. Strini   G. Schwantzer   B. Vidic   O. Findl   A. Wedrich   N. Ardjomand     

Abstract Details


To evaluate, whether hyperopic patients with short axial length and high dioptric intraocular lens (IOL) power may achieve a higher depth of focus with better near and intermediate visual acuity after implantation of a monofocal spherical or aspheric IOL.


Department of Ophthalmology, Medical University of Graz, Graz, Austria


Patients presenting for cataract surgery were divided by calculated IOL power into a hyperopic (�â�‰�¥ 22.0 D) or emmetropic (18.0 to 21.5 D) subgroup, and received either a spherical (Sensar AR40e) or an aspheric IOL (Tecnis ZA9003). Postoperative measurements included corrected and uncorrected distance visual acuity (CDVA, UDVA), distance-corrected intermediate and near visual acuity (DCIVA, DCNVA), root-mean-square (RMS) values of corneal and total eye higher-order aberrations (HOA) and spherical aberrations (SA), and photopic and mesopic contrast sensitivity.


Sixty-six eyes of 62 patients were enrolled in this study; 30 eyes in the spherical IOL group (16 hyperopic and 14 emmetropic eyes) and 36 eyes in the aspheric IOL group (17 hyperopic and 19 emmetropic eyes). UDVA, CDVA, and contrast sensitivity did not differ significantly among the spherical and aspheric IOL group, whereas DCIVA and DCNVA were significantly increased in the spherical IOL group (P = 0.002, P= 0.001, respectively). In both IOL groups, no significant differences were found between the hyperopic and emmetropic subgroups in DCIVA and DCNVA.


Implantation of a monofocal spherical IOL resulted in an increased depth of focus without significant degradation of distance visual acuity or contrast sensitivity. There were no differences in depth of focus between hyperopic and emmetropic eyes.

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