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
The Eye of Argon The Eye of Argon The Eye of Argon is a heroic fantasy novella that narrates the adventures of Grignr, a barbarian. It was written in 1970 by Jim Theis (August 9, 1953 – March 26, 2002) and circulated anonymously in science fiction fandom since then. It has been described as "one of the genre's most beloved pieces of appalling prose", the "infamous 'worst fantasy novel ever' published for fans' enjoyment," and "the apotheosis of bad writing", and has subsequently been used as part of a common science fiction convention party game. The novella was written in 1970 by Jim Theis,