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David Curragh, Patrick Hassett; Prevalence of Corneal Astigmatism in a Cataract Population. Invest. Ophthalmol. Vis. Sci. 2013;54(15):860.
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© ARVO (1962-2015); The Authors (2016-present)
To determine the prevalence of corneal astigmatism in a cataract population to aid cataract surgeons with their options for correcting astigmatism and assess the demand for toric intraocular lenses.
Keratometric data was collected for all patients who attended for routine cataract surgery at two different sites between January 2008 and December 2011. Data was analysed retrospectively.
Data was complied for 1105 eyes of 941 patients. Results revealed a mean corneal astigmatism of 1.13 ± 0.91. The corneal astigmatism was 0.50D or less in 283 eyes (25.6%), between 0.51 D and 1.00 D in 374 (38%) and between 1.01 and 1.50D in 193 eyes (17.5%). It was 1.50D or less in 850 eyes (76.9%) and more than 2.00 D in 138 eyes (12.5%), more than 2.50 D in 80 eyes (7.24%), more than 3.00D in 41 eyes (3.71%) and more than 3.50 D in 28 eyes (2.53%).
Of patients selected for routine cataract surgery, 40.5% of eyes had more than 1.00 D of corneal astigmatism and 12.5% had more and 2.00D. 3.7% had more than 3.00D and 2.53% had more than 3.50D of corneal astigmatism. This shows the potential demand for toric intraocular lens insertion in this population.
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