Haag-Streit Lenstar 900 uses optical low coherence reflectometry (OLCR) for measurement of the axial length parameters of the eye. This is the basis for excellent IOL prediction. It was the first optical biometer to capture all relevant axial dimensions of the eye to take full advantage of latest generation IOL prediction methods. Additionally, the Lenstar 900 measures a wide range of useful biometric parameters, including pupillometry, corneal curvature, white-to-white, and more.