Panacea IOL Calculator

Abstract

The Panacea formula is a theoretical vergence thin lens formula that can calculate the spherical and toric intraocular lens (IOL) power. There are some relevant differences over other similar IOL formulas. The lens position algorithm is based on four biometric variables: axial length, keratometry, anterior chamber depth, and lens thickness. Keratometry is modified as a function of anterior to posterior curvature ratio to avoid errors in altered corneas. The axial length is transformed correcting the bias in extreme cases. The corneal power is optimized taking into account the asphericity and the anterior-to-posterior curvature ratio. Several studies have proved better results than other IOL formulas.