Figure 1.

Stitched composite infrared fundus images (Spectralis; Heidelberg Engineering) showing the placement of the array on the retina for S1 (top, 17 weeks after surgery), S2 (middle, eight weeks after surgery), and S3 (bottom, eight weeks after surgery). Electrodes are visible in the images as bright circles. Note that some electrodes are obscured from view due to pigmentation. Dashed blue lines trace the edge of the implant. Red dots indicate the estimated location of the fovea and concentric red circles indicate 10° eccentricities of visual field according to the Drasdo and Fowler schematic eye.^28,29 Green circles signify electrodes that were included in the subject's unique stimulus configuration, which was kept constant for all tasks and settings during the clinical trial. Larger green ovals indicate that two electrodes were operated as a shorted pair. Electrodes that are not circled in green were excluded from the stimulus configuration and were therefore not stimulated during the motion discrimination task. Some optical distortion and stitching artefact is expected.