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Int Ophthalmol. 2017 Aug;37(4):859-865. doi: 10.1007/s10792-016-0332-2. Epub 2016 Sep 13.

Ocular residual astigmatism (ORA) in pre-cataract eyes prior to and after refractive lens exchange.

Author information

1
Department of Ophthalmology, University Medical Centre Hamburg-Eppendorf (UKE), Martinistraße 52, 20246, Hamburg, Germany.
2
Care Vision Refractive Centers, Hamburg, Germany.
3
zentrumsehstärke, Augenarztpraxis am UKE, Hamburg, Germany.
4
Department of Ophthalmology, University Medical Centre Hamburg-Eppendorf (UKE), Martinistraße 52, 20246, Hamburg, Germany. andi.frings@gmail.com.

Abstract

The purpose of this study was to analyze ocular residual astigmatism (ORA) before and after implantation of two different optical types of non-toric multifocal intraocular lenses (MIOL) in pre-cataract patients. This retrospective cohort study analyzed 72 eyes from 72 consecutive patients after MIOL surgery . To investigate magnitude and axis of astigmatic changes, the concepts of true corneal astigmatism and Alpins vector method were applied. There were no statistically significant between-group differences prior to surgery. The mean refractive surgically induced astigmatism (RSIA) (P = 0.063) and the topographic SIA (TSIA) (P = 0.828) did not differ significantly between the lenses, and the summated vector mean for ORA was reduced in terms of magnitude by approximately 0.30 Diopter. ORA in pseudophakic eyes mainly results from the posterior corneal surface and less from IOL tilting, postoperative posterior capsule shrinkage, or secondary cataract.

KEYWORDS:

Alpins vector method; Multifocal intraocular lens; Ocular residual astigmatism; Topographic astigmatism

PMID:
27624172
DOI:
10.1007/s10792-016-0332-2
[Indexed for MEDLINE]

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