Prevalence of corneal astigmatism before cataract surgery in Western Indian Population

Publication date: Available online 24 March 2017
Source:Medical Journal Armed Forces India
Author(s): P.S. Moulick, Deepak Kalra, Alok Sati, Sandeep Gupta, M.A. Khan, Archana Singh
BackgroundThe prevalence and nature of corneal astigmatism among cataract surgery candidates has not been well-documented in Indian population. The purpose of the study is to analyse prevalence and presentation patterns of corneal astigmatism (CA) in cataract surgery candidates.MethodsKeratometric values were measured in patients before cataract extraction. Descriptive statistics of CA were analysed including the assessment with age ranges.ResultsMean CA of 223 eyes of 223 patients [mean age 61±10 years (range, 29–90 years)] was 0.88±0.61 (95% CI, 0.80–0.96) with 27.8%, 51.1% and 21.1% having with the rule (WTR), against the rule (ATR) and oblique astigmatism (OBL) respectively. Between 40 and 50 years, ATR exceeds WTR and reaches 100% by 80 years. A trend of less negative CA was seen up to 60 years and then increases up to 90 years. CA was below 0.25 dioptre (D) in 17.5% of eyes, between 0.25 and 1.25 D in 63.7% and ≥1.50 D in 18.8% of eyes.ConclusionsConsidering CA<1.25 D in majority of cataract surgery candidates, it is preferable to perform inexpensive keratorefractive procedures rather expensive toric IOLs, especially in developing world.



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