Fig. 5.

Eye displacement during pursuit. A and C: macular degenerations (MDs; A) and controls (C) show eye displacement across the entire ramp portion of the trial during head-unrestrained smooth pursuit. Columns correspond to: total eye displacement (Eye_Tot), eye displacement due to saccades only (Eye_Sac), eye displacement due to smooth pursuit only (Eye_Pur), head displacement (Head_Tot), and total displacement due to eye and head motion (Total), respectively. B and D: MDs (B) controls (D) show eye displacement during head-restrained smooth pursuit. Columns correspond to: total eye displacement, eye displacement due to saccades only, and eye displacement due to smooth pursuit only. Each color corresponds to a given participant. Data are averaged across all trials, all directions; error bars are SE. E: comparison of total gaze (eye and head) displacement due to smooth pursuit alone during head-unrestrained (open) and head-restrained (solid) conditions across target trajectories for individuals with macular degeneration (black) and controls (gray). F: comparison of total eye-in-space displacement (smooth pursuit + saccades), organized as described in E. All data are normalized by target displacement. Dashed gray lines in E and F indicate equal eye and target displacement.