Abstract
Accurate intraocular lens (IOL) power calculation is crucial to meet the high expectations of patients undergoing cataract surgery. With current technological advances, IOL power calculation in normal eyes is relatively straightforward. However, it is problematic in eyes that have undergone corneal refractive surgery. There are two major causes of error in IOL calculations in these eyes: 1) inaccurate corneal power measurements obtained from standard keratometers or computerized videokeratography (CVK), and 2) incorrect estimation of effective lens position (ELP) calculated by most 3rd or 4th generation IOL power calculation formulas.
Highlights
Accurate intraocular lens (IOL) power calculation is crucial to meet the high expectations of patients undergoing cataract surgery
There are two major causes of error in IOL calculations in these eyes: 1) inaccurate corneal power measurements obtained from standard keratometers or computerized videokeratography (CVK), and 2) incorrect estimation of effective lens position (ELP) calculated by most 3rd or 4th generation IOL power calculation formulas
In eyes with prior laser-assisted in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK), several methods have been proposed to improve the accuracy of IOL power calculation in these eyes
Summary
Intraocular Lens Power Calculations in Eyes with Prior Corneal Refractive Surgery Accurate intraocular lens (IOL) power calculation is crucial to meet the high expectations of patients undergoing cataract surgery. IOL power calculation in normal eyes is relatively straightforward.
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