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Corneal astigmatism present in majority of cataract surgery candidates

J Cataract Refract Surg. 2009:35:70-75.

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Corneal astigmatism was found in most cataract surgery candidates in various age ranges.

As part of presurgical screening, a prospective study measured refractive and keratometric data in 2,415 patients of various ages: 40 years and younger, 41 to 50 years, 51 to 60 years, 61 to 70 years, 71 to 80 years, and 81 to 90 years. More hyperopic values were found in the older groups.

For all patients, there was no corneal astigmatism in 13.2% of eyes, astigmatism between 0.25 D and 1.25 D in 64.6% of eyes and astigmatism of 1.5 D or greater in 22.2% of eyes. Significant changes (P < .01) were seen in nearly all refractive values between age groups.

"This information will allow determination of the most prevalent keratometric conditions so better strategies for IOL manufacturing and clinical prescription can be selected," the study authors said.