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Total corneal power calculation may improve cataract surgery refractive outcomes
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Using the total corneal power astigmatic axis to measure corneal power may improve the refractive outcomes of cataract and refractive surgical procedures, according to a study.
The prospective, comparative study included 100 eyes of 100 randomly selected cataract patients. Automated keratometry, simulated keratometry, the steepest and flattest corneal power, and the steepest axis of the total corneal power were recorded for all eyes.
In eyes with high astigmatism, the investigators found that 40% had more than 10° of axis difference in total corneal power calculations compared to automated keratometry.
As measured by total corneal power, the mean magnitude of astigmatism was also significantly higher than when measured with automated keratometry (P = .01), but not compared to when measured with simulated keratometry.
No statistical significance was found in the mean steepest axis between total corneal power, automated keratometry, and simulated keratometry.
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