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Head-Unrestrained Eye Movements in Macular Degeneration: a Story in 3 Parts

September 20, 2021 @ 11:00 am - 12:30 pm

Natela Shanidze, Smith-Kettlewell Eye Research Institute
Zoom meeting: https://berkeley.zoom.us/j/91202816466?pwd=aElmL0F3RzBxbmowRHNsTlJvbDJ1QT09
Meeting ID: 912 0281 6466
Passcode: Oxyopia
Loss of the central retina, including the fovea (for example due to macular degeneration, MD), can lead to a loss of visual acuity and oculomotor deficits and thus have profound effects on day-to-day tasks. Computer vision-based developments in wearable eye tracking devices make them an attractive solution for studies of eye movements during naturalistic head/body motion and allow researchers to extend studies in this population to a broader set of daily tasks and more naturalistic behaviors and settings. First, I will show the results of our own study looking at head-unrestrained smooth pursuit in individuals with MD and what we learned about eye-head coordination in this population. The study has also provided us with insights into how MD-related changes, such as eccentric fixation provide additional challenges for calibration and collection of head-unrestrained eye movement data using current technology. Before these “systems'” potential can be fully realized, a thorough assessment of potential sources of error is needed. In the second part of my talk, I will focus on three possible sources of error for general data collection: camera motion during head/body motion, choice of calibration marker configuration, and eye movement estimation. Finally, focusing on the MD population, I will show decreases in calibration accuracy relative to fixation eccentricity and discuss a robotic calibration and validation tool we are developing in the lab that may allow for future developments of calibration and tracking algorithms designed with these individuals in mind.


September 20, 2021
11:00 am - 12:30 pm