The researchers asked volunteers to stare at a dot on the screen for a long time in a dark room, while using infrared cameras to track their eye movements and blinks in real time. Every time the volunteers blinked, the dot moved one centimeter to the right. The volunteers said afterwards that they were not aware of the slight change. After about 30 blinks, the volunteers' eyes adapted to the synchronous movement of the dots and could automatically shift to the new dots after blinking.
This passage is intended to explain that blinking can stabilize the line of sight.