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
Eye of the Dragon Eye of the Dragon Eye of the Dragon is a single-player roleplaying gamebook written by Ian Livingstone, illustrated by Martin McKenna and published in 2005 by Wizard Books. It forms part of Steve Jackson and Ian Livingstone's "Fighting Fantasy" series. It is the 21st in the Wizard series. "Eye of the Dragon" was the first new "Fighting Fantasy" gamebook published by Wizard, although the book is an extended version of the adventure from Ian Livingstone's earlier book "Dicing with Dragons" rather than a completely original adventure. The book is made up of 407 references rather than the usual 400. This