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Corneal Astigmatism Measurement

The process and technologies used for measuring corneal astigmatism before cataract surgery, including the use of various devices and calculators to improve the accuracy of toric intraocular lens (IOL) selection.

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Jan 16, 2026
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How is corneal astigmatism measured before cataract surgery and how accurate are the different devices?

Corneal astigmatism before cataract surgery is measured with a toolbox of technologies—manual/automated keratometers, Placido topographers, Scheimpflug tomographers, swept‑source OCT biometers and int...