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 That Cries The Eye That Cries The Eye that Cries ("El Ojo que Llora" in Spanish) is a memorial that was born as a private initiative designed to honor the thousands of victims as a result of terrorism in Peru, to strengthen the collective memory of all Peruvians and to promote peace and reconciliation in the country. The Eye that Cries is part of a larger project called The Memory Alameda which will incorporate other art pieces, large extensions of green areas and the Museum of Memory (Yuyanapaq). The memorial, The Eye That Cries, located in Campo de Marte, a park in