The research in my lab examines the neural processes, strategies and adaptations that humans use to interact with objects in the real world. We investigate these questions using psychophysics, eye movements, computational modeling and neuroimaging. Our goal is to understand the mechanisms of normal vision and action, as well as the basis of attention and visual adaptation in clinical populations. This work includes attention deficits in amblyopia, and the potential for binocular vision in individuals with age-related macular degeneration.
In this project we try to gain a better understanding of what visual strategies people use to gather information in the world.
This project investigates the interaction between central field loss (CFL) and vestibular function.
The project investigates the deficits in smooth pursuit in individuals with age-related macular degeneration within the framework of a Bayesian model.
Macular degeneration affects the central retina, often causing asymmetrical damage to the two eyes. How does this asymmetrical loss affect stereopsis — the percept of depth generated by the small separation of image features in the two eyes?
Bilateral field loss due to maculopathy creates a scotoma that extends in depth — a volume scotoma. Morevoer the size of the scotoma depends on whether observers turn their eyes to track a target as it comes closer. This project investigates how the volume scotoma affects the ability to track oncoming targets in these individuals, and in controls with a simulated volume scotoma.
Stereopsis is important for tasks of daily living such as eye-hand coordination. It is best in central vision but is also mediated by the periphery. Previously we have shown that individuals with central-field loss who have residual stereopsis in the periphery perform better at an eye-hand-coordination task. Here we sought to determine what sets the limit of stereopsis, defined as the largest disparity that supports the sustained appearance of depth, in the near periphery in healthy individuals.
Vergence to disparity targets in the central visual field is impaired in individuals with amblyopia and strabismus.
The Center's research goal is to develop and apply new scientific knowledge and practical, cost-effective devices to better understand and address the real-world problems of blind, visually impaired, and deaf-blind consumers