Research in our lab focuses on how we perceive visual forms and patterns, and how form perception is degrade by abnormal visual
experience early in life (amblyopia). Specifically, we use psychophysics, computational modelling and brain imaging (fMRI) to
study the neural mechanisms of normal pattern vision in humans, and to learn how they are degraded by abnormal visual experience
(amblyopia). While amblyopia is known to influence the properties of neurons in cortical area V1 recent work in our laboratory
suggests that amblyopia may also result in damage to higher cortical areas.
Sharma, V., Levi, D.M. & Klein, S.A. Under-counting features and missing features: evidence for a high level deficit in strabismic amblyopia. Nature Neuroscience, 3, 496-501, 2000.
Yu, C. & Levi, D.M. Surround modulation in human vision unmasked by masking experiments. Nature Neuroscience, 3, 724-728, 2000.
Popple, A.V. & Levi, D.M. Amblyopes see true alignment where normal observers see illusory tilt. Proceedings of the National Academy of Sciences (PNAS), 97, 11667-11672, 2000.
Levi, D.M. & Klein, S.A. Classification images for detection and position discrimination in the fovea and parafovea. Journal of Vision, 2, 46-65, 2002.
Levi, D.M., Klein, S.A. & Hariharan, S. Suppressive and Facilitatory Spatial Interactions in Foveal Vision: Foveal Crowding is simple contrast masking. Journal of Vision, 2, 140-166, 2002
Levi, D.M. & Klein, S.A. Noise provides some new signals about the spatial vision of amblyopes. Journal of Neuroscience, 23, 2522-2566, 2003.
McKee, S.P., Levi, D.M. & Movshon, J.A. The pattern of visual deficits in amblyopia. Journal of Vision, 3, 380-405, 2003
Li, R.W., Levi, D.M. & Klein, S.A. Perceptual learning improves efficiency by re-tuning the "template" for position discrimination. Nature Neuroscience, 7, 178-183, 2004.
Levi, D.M. & Saarinen, J. Perception of mirror-symmetry in Amblyopic vision. Vision Research, 44, 2475-2482, 2004.
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