Research in our lab focuses on the understanding of how the visual system works in people with normal vision, as well as in people with uncorrectable subnormal vision (visual impairment). Uncorrectable sub-normal vision can occur as a result of an eye disease (e.g., age-related macular degeneration, the leading cause of visual impairment in the US for people over the age of 65), or even in the absence of an eye disease (amblyopia, or "lazy eye").
In our lab, we combine various non-invasive techniques to study vision of people with normal or impaired vision. These techniques include standard (e.g., signal detection theory) and more contemporary psychophysical methods (e.g., reversed-correlation method), retinal imaging using Scanning Laser Ophthalmoscope combined with psychophysical tasks, and functional magnetic brain imaging (fMRI).
The ultimate goals of our research program are to understand the various limiting factors on visual performance in people with visual impairment, and to devise methods, devices or rehabilitative strategies to improve the functional vision of these people, thereby improving their quality of life.
Chung STL, Levi DM, Legge GE (2001). Spatial-frequency and contrast properties of crowding. Vision Research, 41: 1833–1850.
Chung STL, Legge GE, Tjan BS (2002). Spatial-frequency characteristics of letter identification in central and peripheral vision. Vision Research, 42: 2137–2152.
Chung STL, Legge GE, Cheung S-H (2004). Letter recognition and reading speed in peripheral vision benefit from perceptual learning. Vision Research, 44: 695–709.
Chung STL (2007). Learning to identify crowded letters: Does it improve reading speed? Vision Research, 47: 3150–3159.
Chung STL, Li RW, Levi DM (2007). Crowding between first- and second-order letter stimuli in normal foveal and peripheral vision. Journal of Vision, 7(2):10, 1–13.
Chung STL, Patel SS, Bedell HE, Yilmaz O (2007). Spatial and temporal properties of the illusory motion-induced position shift for drifting stimuli. Vision Research, 47: 231–243.
Chung STL, Tjan BS (2007). Shift in spatial scale in identifying crowded letters. Vision Research, 47: 437–451.
Chung STL, Li RW, Levi DM (2008). Crowding between first- and second-order letters in amblyopia. Vision Research, 48: 788–798.
Chung STL, Jarvis SH, Woo SY, Hanson K, Jose RT (2008). Reading speed does not benefit from increased line spacing in AMD patients. Optometry & Vision Science, 85: 827–833.
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