Projects
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Completed
Parafoveal Crowding
Crowding increases with eccentricity, and is most readily observed in the periphery. During natural, active vision however, central vision plays an important role. Measures of critical distance to estimate crowding are difficult in central vision, as these distances are small.
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Completed
Audio/Tactile BART Station Maps
This collaborative project between Smith-Kettlewell and the San Francisco LightHouse applies Smartpen-Based audio/tactile graphics tools to improve orientation and wayfinding by travelers with visual disabilities in and around unfamiliar transit stations.
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Completed
Tutorials and Reference
These are tutorials and reference materials I have written on various topics in probability and geometry over the years.
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Completed
SKERI-VF
Walker et al (Renninger, Psomadakis, Dang & Fletcher, 2008) suggested a novel method to estimate the monocular scotoma area from perimetry data in macular degeneration based on (i) an optic-disc based estimation of the location of the fovea and (ii) the increase in the receptive field size with eccentricity. Here, Dr Walker and I introduce a new GUI that applies this method to data from the Optos OCT/SLO.
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Completed
Assessment of Speechreading with Dual Sensory Loss: Visual and Hearing Impairments
The purpose of this research study is to test subjects who have various hearing and vision problems on their lipreading, visual and auditory skills in order to understand the relationships between lipreading and visual impairment.
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Completed
Micro-Perimetry by Scanning Laser Ophthalmoscope
We developed software to make the retinal placement of stimuli during micro-perimetry by a scanning laser ophthalmoscope (SLO) independent of involuntary fixational eye movements.
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Completed
Motion as a Cue for Attention
We investigated whether relative motion can serve as a cue for sustained attention.
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Completed
Focal Attention and Letter Recognition
We studied letter recognition in 8 deg eccentricity from the fovea after attracting sustained focal attention to the stimulated location by a cue. Young and elderly healthy subjects, as well as patients with central vision loss participated.
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Completed
Reading with the Retinal Periphery
Typographical features of letters were manipulated in such a way that frequently occurring letter confusions in eccentric viewing happened less frequently.
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Completed
Dyslexia Project
We studied the ability of dyslexic young teenagers to fluently name pictograms (shapes of objects). We found that some dyslexics are very good at this task, some were even better than the control subjects.
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Completed
Hearing Aid for Blind Travelers with Hearing Loss
Blind travelers rely on subtle acoustic cues for independent mobility. When hearing becomes impaired, as in the normal aging process, a special type of hearing aid may be needed to enhance these cues.
