Fig. 1

Schematic diagrams of the paradigm for eye movement assessment. During the test, there was always only one target presented on the screen, changing locations in a specified order. a Sustained fixation test. The target was presented in order from location 1 to 9, remaining for 3 s at each location. The purplish-red number “1” at the upper right corner was the cumulative number of gaze positions extracted from all samples grabbed at each location, recorded in real time from “1” to “5”. The “3 s” at the lower right was the actual sampling time for each location; b Visually guided saccade test. The target was presented in order from location 1 to 8, staying for 3 s at each location. Likewise, the purplish-red number “1” at the upper right corner was recorded in real time from “1” to “10” at each location. The “1 s” at the lower right was the actual sampling time for each location