Reading      Mobility      Visual Assesment      Evaluation of Devices

Mobility and Wayfinding

People with visual impairment frequently experience mobility problems and difficulty finding their way around unfamiliar environments.

Self movement and the movements of other people and objects generate patterns of motion across the visual field known as Optic Flow. We are studying how the visual system processes this important navigation cue and how it is affected in visual impairment. We have developed techniques to examine motion processing with moving natural images, which are more relevant for real-world mobility.

We are also studying the eye movements and gaze points of people with visual impairment as they walk around unfamiliar environments. We use a mobile eye tracker that allows participants to move freely though real indoor or outdoor environments. The fixation patterns of normally- and partially-sighted people are quite different and identify compensatory visual behaviour that people with low vision adopt.

Professor Gary Rubin

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