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Graefe's Archive for Clinical and Experimental Ophthalmology

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01-07-2009 | Cataract

Comparison of contrast sensitivity, depth of field and ocular wavefront aberrations in eyes with an IOL with zero versus positive spherical aberration

Authors: Jay S. Pepose, Mujtaba A. Qazi, Keith H. Edwards, Jeff P. Sanderson, Edwin J. Sarver

Published in: Graefe's Archive for Clinical and Experimental Ophthalmology | Issue 7/2009

Abstract

Purpose

To compare the clinical performance of the zero spherical aberration (SA) SofPort LI61AO (AO, Bausch & Lomb) intraocular lens (IOL) to the AcrySof SA60AT (AT, Alcon), which has positive spherical aberration.

Methods

Patients underwent uneventful phacoemulsification with implantation of either an aspheric (AO, n = 19) or spherical (AT, n = 20) IOL. Postoperatively, a 5 mm artificial pupil was positioned in trial frames with the cycloplegic refraction during monocular, mesopic contrast sensitivity (CSF) and low-contrast visual acuity (LCVA) testing with glare. Ocular and corneal wavefront error was determined at 5 mm diameters.

Results

Mean CSF scores were better at all frequencies tested for the AO than for the AT group, and achieved statistical significance at 1.5 cpd (p = 0.038) and 6 cpd (p = 0.017). With glare, AO eyes read 30.9 ± 5.0 low-contrast letters versus 25.2 ± 6.8 for AT eyes (p = 0.005) (mean ΔLogMAR = −0.10), while high-contrast acuity and refraction were similar. Eyes implanted with the SA60AT had 43% greater positive spherical aberration at a 5 mm wavefront diameter, with no significant difference in corneal SA between groups. A through-focus analysis demonstrated a similar depth of field, yet a comparatively higher visual Strehl ratio for the aspheric IOL at emmetropia (p = 0.038).

Conclusion

Eyes with the SofPort Advance Optics neutral aberration IOL demonstrated less spherical aberration and better low-contrast acuity compared to eyes with a spherical IOL, without sacrificing tolerance to defocus. The aspheric IOL showed superior optical and clinical performance, which is most likely due to its surface design.

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Title: Comparison of contrast sensitivity, depth of field and ocular wavefront aberrations in eyes with an IOL with zero versus positive spherical aberration
Authors: Jay S. Pepose
Mujtaba A. Qazi
Keith H. Edwards
Jeff P. Sanderson
Edwin J. Sarver
Publication date: 01-07-2009
Publisher: Springer-Verlag
Published in: Graefe's Archive for Clinical and Experimental Ophthalmology / Issue 7/2009
Print ISSN: 0721-832X
Electronic ISSN: 1435-702X
DOI: https://doi.org/10.1007/s00417-009-1038-1

At a glance: The STEP trials

Springer Medicine

Comparison of contrast sensitivity, depth of field and ocular wavefront aberrations in eyes with an IOL with zero versus positive spherical aberration

Abstract

Purpose

Methods

Results

Conclusion

At a glance: The STEP trials

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusion

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