Barrett IOL Calculator

The Barrett IOL Calculator implements the Barrett Universal II formula to estimate intraocular lens power from biometric inputs. It yields recommended IOL powers for standard target refractions and outputs predicted residual refractions. It is a planning aid, not a substitute for clinical judgment.
Conceptually, Barrett II models the expected postoperative lens position (ELP) as a function of multiple eye measurements and solves for the IOL power that achieves the chosen target refraction. The tool accepts required inputs (axial length and keratometry) and optional advanced inputs (ACD, LT, WTW) to refine the estimate. Results include the recommended IOL powers and a transparency about the predicted outcome.
Beneficiaries include ophthalmologists, cataract surgeons, and clinics seeking faster, consistent planning. Its unique value lies in applying a validated, multi-parameter model that remains robust across diverse anatomy by incorporating both standard and advanced biometric data. Core features include multi-field inputs, input validation, support for multiple targets, and clear numerical outputs suitable for surgical planning.
Common use cases encompass routine cataract planning, eyes with unusual axial lengths, post-refractive surgery eyes, and multi-eye sequences where consistency matters.