case_images: PMC9149443_01
case_images: Eye trace under binocular viewing conditions showing stable fixation. The upper trace shows horizontal eye movements; vertical eye movements are in the lower trace.
case_images: cop-0013-0286-g01.jpg
case_images: PMC9149443_01_cop-0013-0286-g01.jpg
case_images: F1
case_images: Figure 1 shows the eye movement recording obtained during binocular fixation in the primary position.
case_images: Eye movement trace showing voluntary flutter in a 2-s time window. The upper trace shows horizontal eye movements; vertical eye movements are in the lower trace.
case_images: cop-0013-0286-g02.jpg
case_images: PMC9149443_01_cop-0013-0286-g02.jpg
case_images: F2
case_images: Figure 2, recorded from the left eye, shows voluntary flutter performed by the patient over a 2-s period. The upper eye movement trace in Figure 2 shows back-to-back horizontal saccadic oscillations with an average frequency of 13 Hz, reducing over time.