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J Cataract Refract Surg. 2013 Feb;39(2):188-92. doi: 10.1016/j.jcrs.2012.08.060. Epub 2012 Nov 7.

Prevalence of corneal astigmatism before cataract surgery in Chinese patients.

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  • 1State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.

Abstract

PURPOSE:

To assess the demographics and distribution of corneal astigmatism before cataract surgery in Chinese patients.

SETTING:

State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.

DESIGN:

Clinic-based cross-sectional study.

METHODS:

From July 2009 to May 2011, preoperative bilateral partial coherence interferometry (IOLMaster) was performed in consecutive patients having cataract surgery. Patient demographics and keratometric data were recorded.

RESULTS:

The mean age of the 2849 patients (4831 eyes) was 70.56 years ± 9.55 (SD); there was a predominance of women patients (64.0%). The mean axial length was 23.58 ± 1.13 mm. The mean corneal astigmatism in this cohort was 1.01 D (range 0.05 to 6.59 D). Corneal astigmatism was between 0.25 D and 1.25 D in 67.7% of eyes, 1.25 D or higher in 27.5% eyes, and less than 0.25 D in 4.8% of eyes. Astigmatism was with the rule in 25.1% of eyes, against the rule (ATR) in 58.2% of eyes, and oblique in 16.7% of eyes. The mean steep keratometry measurement was 44.76 ± 1.56 D. Against-the-rule astigmatism increased significantly with older age.

CONCLUSIONS:

Corneal astigmatism largely fell between 0.25 D and 1.25 D in these predominantly elderly female Chinese patients, and ATR astigmatism increased with age.

FINANCIAL DISCLOSURE:

No author has a financial or proprietary interest in any material or method mentioned.

Copyright © 2012 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.

PMID:
23141077
[PubMed - indexed for MEDLINE]
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