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 Inner Eye 20th National Film Awards in 1972. Mukherjee is known as the most informed Indian artist of his generation and a legend of modern Asian Art. Born with severe eye problem, being myopic on one eye and blind in the other, Mukherjee lost his sight completely after an unsuccessful cataract operation. However, he continued his work as an artist. The Academy Film Archive, part of the Academy Foundation, took an initiative to restore Satyajit Ray's films and could successfully restore 19 Ray films. "The Inner Eye" is yet to be restored but found to be in good condition for the restoration.