Intra- and Inter-Observer Agreement of a Portable A-Scan Ultrasound Biometer in Sitting and Supine Positions and Validity Against an Optical Biometer

Consistent with reports on other a-scan devices, the Scanmate-A measured shorter AL and shallower ACD than the IOLMaster. Although, mean or median AL and ACD did not differ across study visits, observers, and body positions, large limits of agreement on Bland-Altman analyses must be accounted for by users of the Scanmate-A.