Piggyback IOL Calculator

This calculator helps select an additional (piggyback) IOL for pseudophakic patients with residual refractive error. Calculations are based on lens placement within the ciliary sulcus. Based on methodology by Anthony Vanrachack, OD.

Refraction Type:

ℹ️ Refraction from pseudophakic patient (already at IOL plane)

Calculation Mode:

Manifest Refraction Sphere (D)

Manifest Refraction Cylinder (D) (optional, defaults to 0)

Spherical Equivalent (SEQ)

Educational Tool Only: This calculator is for educational purposes only. Always verify with manufacturer nomograms and consider individual patient factors. Important: This calculator assumes piggyback IOL placement within the ciliary sulcus. Clinical judgment and surgical expertise are required for all IOL selection decisions.