Eye tracking white sclera (limbus tracking). It presents another challenge for vertical eye movements due to obstruction of eyelids. Eye-tracking setups vary greatly: some are head-mounted, some require the head to be stable (for example, with a chin rest), and some function remotely and automatically track the head during motion. Most use a sampling rate of at least 30 Hz. Although 50/60 Hz is more common, today many video-based eye trackers run at 240, 350 or even 1000/1250 Hz, speeds needed in order to capture fixational eye movements or correctly measure saccade dynamics. Eye movements are typically divided into fixations and saccades
Story of the Eye within the narrative. He also traces a second series of liquid metaphors within the text, which flow through tears, cat's milk, egg yolks, frequent urination scenes, blood and semen. Furthermore, he argues that he does not believe that "Story of the Eye" is necessarily a pornographic narrative, given that these structuring chains of metaphors do provide coherent underpinning sequences. Story of the Eye Story of the Eye () is a 1928 novella written by Georges Bataille, as a psychoanalytical task, that details the increasingly bizarre sexual perversions of a pair of teenage lovers. It is narrated by the young man