Fig. 4.

Characterization of axial motion tracking for a model eye with induced motion during repeated imaging at a 48 Hz frame rate. (A). Axial scans from a single location in the frame in the model eye with induced reference movement (0.1 mm/s periodic triangle with 0.5 mm amplitude). Images represent different scenarios: with induced movement and without tracking (On-Off); with induced movement and with tracking (On-On); without induced movement and with tracking (Off-On); without induced movement and without tracking (Off-Off). (B-C) The displacements (determined by analysis of the OCT image time series) demonstrate that the motion can be tracked over a period of time with a standard deviation of 3.5 microns. (D) The root mean squared (RMS) errors of the sample positions relative to the mean position for different induced linear movement speeds with tracking.