Patients who have had LASIK or PRK have altered corneal shapes that traditional formulas often miscalculate.
Biometry and Intraocular Lens (IOL) power calculations are the cornerstone of modern cataract surgery, transforming the procedure from simple lens removal to a precise refractive intervention. The goal is no longer just to restore sight, but to achieve "refractive neutrality" or a specific target vision without the heavy reliance on glasses. The Role of Biometry Biometry & IOL Power Calculations - PDF
The curvature of the cornea, which provides its refractive power. Patients who have had LASIK or PRK have
Used both AL and K to predict ELP. These remain widely used today. Biometry & IOL Power Calculations - PDF
