Preeti Verghese
Senior Scientist
Degrees: Ph.D.
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.
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External Links
. (2017). Latent Binocular Interactions in Cortical Area V1 of Human Amblyopia. Journal of Vision, 17(10), 758-758. Date Published 09/2017. doi:10.1167/17.10.758
. (2017). Cortical sources of vernier acuity in the human visual system: an EEG source-imaging study. Journal of Vision, 17(6). Date Published 06/2017.
. (2017). Attention to Multiple Objects Facilitates Their Integration in Prefrontal and Parietal Cortex. Journal of Neuroscience, 37(19). Date Published 05/2017. doi:10.1523/JNEUROSCI.2370-16.2017
. (2017). Monocular and Binocular Smooth Pursuit in Central Field Loss. Vision Research.
. (2017). Texture segmentation influences the spatial profile of presaccadic attention. Journal of Vision, 17(2).
. (2016). Training Eye Movements for Visual Search in Macular Degeneration. Journal of Vision, 16(15). Date Published 12/2016.
. (2016). Degraded attentional modulation of cortical neural populations in strabismic amblyopia. Journal of Vision, 16(3), 1–16.
. (2016). Smooth pursuit eye movements in patients with macular degeneration. Journal of vision, 16, 1.
. (2016). Accuracy of Eye Position for Saccades and Smooth Pursuit. Journal of Vision, 16(23). doi:10.1167/16.15.23
. (2016). Degraded attentional modulation of cortical neural populations in strabismic amblyopia. Journal of vision, 16, 16.
. (2016). Depth Perception and Grasp in Central Field Loss. Investigative ophthalmology & visual science, 57, 1476-87.
. (2015). An irreducible delay in manual and saccadic reaction time in amblyopia. Journal of vision.
. (2015). Stop before you saccade: Looking into an artificial peripheral scotoma. Journal of vision, 15, 7.
. (2015). Cortical sources of vernier acuity: an EEG-source imaging study. Journal of vision, 15, 1004.
. (2015). The Efficiency of Vision and Action. (). doi:10.1016/j.visres.2015.06.003
. (2014). The influence of segmentation and uncertainty on target selection. Journal of vision, 14, 3.
. (2013). Attentional modulation: target selection, active search and cognitive processing. Vision research, 85, 1-4.
. (2012). Attention selects informative neural populations in human V1. The Journal of neuroscience : the official journal of the Society for Neuroscience, 32, 16379-90.
. (2012). The selectivity of task-dependent attention varies with surrounding context. The Journal of neuroscience : the official journal of the Society for Neuroscience, 32, 12180-91.
. (2009). Peeling plaids apart: context counteracts cross-orientation contrast masking. PloS one, 4, e8123.
. (2009). Visual attention: Neurophysiology, psychophysics and cognitive neuroscience. Vision research, 49, 1033-6.
. (2007). Orientation discrimination in the periphery depends on the context. Journal of Vision, 7, 585–585.
. (2005). An information maximization model of eye movements. Advances in neural information processing systems, 17, 1121-8.
. (2005). Predictability and the dynamics of position processing in the flash-lag effect. Perception, 34, 31-44.
. (2005). Attention to locations and features: different top-down modulation of detector weights. Journal of vision, 5, 556-70.
. (2002). The unique criterion constraint: a false alarm?. Nature neuroscience, 5, 707; author reply 707-8.
. (2002). Integration of speed signals in the direction of motion. Perception & psychophysics, 64, 996-1007.
. (2002). Contour completion through depth interferes with stereoacuity. Vision research, 42, 2153-162.
. (2000). Stimulus configuration determines the detectability of motion signals in noise. Journal of the Optical Society of America. A, Optics, image science, and vision, 17, 1525-34.
. (1999). Local motion detectors cannot account for the detectability of an extended trajectory in noise. Vision research, 39, 19-30.
Verghese Lab
Our laboratory studies the mechanisms of healthy vision and action, as well as the basis of attention and visual adaptation in clinical populations.
Novel Method to Teach Scotoma Awareness
This project aims to improve visual function in individuals with age-related macular degeneration (AMD). AMD isassociated with central field loss that cannot be corrected optically. Individuals with AMD are often unaware of their scotoma and their eye movements follow more random patterns,...
Adaptive Visual Strategies for Information Maximization in Individuals with Macular Degeneration
In this project we try to gain a better understanding of what visual strategies people use to gather information in the world.
Coordination of Eye and Head Movements in Central Field Loss
This project investigates the interaction between central field loss (CFL) and vestibular function. Two-thirds of patients with CFL complain of vestibular problems, such as dizziness and instability, leading to a high incidence of potentially fatal accidents and falls. The problem is...
Characteristics of Smooth Pursuit in Individuals with Central Field Loss
This project investigates the properties of smooth pursuit eye movements in individuals with macular degeneration. Commonly believed to be a fovea-linked eye movement, smooth pursuit has not been previously investigated in individuals with central field loss, despite its importance for...
Fovea Use During Smooth Pursuit
There is continuing debate as to whether smooth pursuit relies on the foveation of a moving target, especially when the target is compact. Previous studies have shown that gaze is placed on the center-of-mass of a target during saccadic eye movements. This research aims to understand whether...