Posters

Impact of corneal spherical aberration on depth of focus after phacoemulsification with implantation of spherical or aspherical intraocular lenses

Poster Details

First Author: G.Steinwender AUSTRIA

Co Author(s):    W. Glatz   M. Nitsche-Resch   G. Schließleder   M. Shajari           

Abstract Details

Purpose:

It is known that decreasing spherical aberration (SA) by the use of aspheric intraocular lenses (IOL) not only improves contrast sensitivity, but also decreases depth of focus compared to spherical IOLs. The purpose of this retrospective study was to evaluate the impact of corneal SA on depth of focus and contrast sensitivity after both, implantation of a spherical or an aspheric IOL.

Setting:

Department of Ophthalmology, Medical University Graz, Austria

Methods:

Sixty-six pseudophakic eyes (62 patients) were included in this retrospective analysis, thereof 30 eyes with a spherical IOL (AMO Sensar AR40E) and 36 eyes with an aspheric IOL (AMO Tecnis ZA9003). Eyes with both IOL types were further divided into 2 groups upon the median amount of corneal SA. Corneal wavefront data derived by Scheimpflug tomography, total eye wavefront data derived by Hartmann-Shack-aberrometry, and parameters of visual function including distance-corrected intermediate visual acuity (DCIVA), distance-corrected near visual acuity (DCNVA), and photopic and mesopic contrast sensitivity were compared between groups.

Results:

After implantation of a spherical IOL, eyes with higher corneal SA achieved a better DCIVA (0.11 ± 0.08 logMAR and 0.17 ± 0.07 logMAR, respectively, P=0.036) and a better mesopic contrast sensitivity (0.89 ± 0.17 logCS and 0.78 ± 0.15 logCS, respectively, P=0.031) compared to eyes with lower corneal SA. In contrast, after implantation of an aspheric IOL no significant differences regarding DCIVA and mesopic or photopic contrast sensitivity were found between eyes with higher and lower corneal SA.

Conclusions:

The impact of corneal SA on optical quality seems to be higher in eyes with spherical IOLs than in eyes with aspheric IOLs.

Financial Disclosure:

... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented