(A) sample arm configuration of the pupil tracking OCT system. IS: imaging scanners, TS: tracking scanner, L: lenses, DM: dichroic mirror, IR: infrared illumination, Cam: pupil tracking camera. The shortpass dichroic mirror with a cut off at 960 nm coupled the pupil camera and the OCT optical axis. (B) and (C) are optical spot diagrams for the untracked and tracked configurations. Scale bar is in microns. The black circle is the Airy disk.