Typical examples of analyses of eye movements during reading.

S4 traces for a patient with a visual field of 4° in the right eye (the green line) and 3° in the left eye (the red line). S12 traces for a patient with a visual field of 10° in the right eye (the green line) and 4° in the left eye (the red line). S33 traces for a healthy volunteer with a visual field of 100° in both eyes (right: the green line, left: the red line. Left: Traces of fixation. The size of the circle indicates the length of the residence time at that position. The red lines and circles reflect the movement of the left eye, and the green lines and circles reflect the movement of the right eye. Middle: Angle distribution of the rotation SC direction. The red and green bars denote the left and right eyes, respectively. Right: Traces of eye movements every 0.01 s. The red and green lines denote the traces of the left and right eyes, respectively. Abbreviations: SC, saccade.