Biometry & Iol Power Calculations - Pdf Today

Historically, was the standard. It used sound waves to measure distance but required physical contact with the eye, which could compress the cornea and lead to errors. Today, Optical Coherence Biometry (like the IOLMaster or Lenstar) is the gold standard. It uses light instead of sound, offering sub-millimeter precision and a non-contact approach that eliminates compression bias. Evolution of IOL Formulas

Used a simple regression equation; often inaccurate for very long or short eyes. Biometry & IOL Power Calculations - PDF

Adjusted for axial length but still limited. Historically, was the standard