Simulating vision loss
What levels of impairment are actually represented?
Joy Goodman (University of Cambridge)
S.D. Waller (University of Cambridge)
Alice Catherine Collins (University of Cambridge)
P. John Clarkson (University of Cambridge)
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Abstract
Capability loss simulators give designers a brief experience of some of the functional effects of capability loss. They are an effective method of helping people to understand the impact of capability loss on product use. However, it is also important that designers know what levels of loss are being simulated and how they relate to the user population. The study in this paper tested the Cambridge Simulation Glasses with 25 participants to determine the effect of different numbers of glasses on a person's visual acuity. This data is also related to the glasses' use in usability assessment. A procedure is described for determining the number of simulator glasses with which the visual detail on a product is just visible. This paper then explains how to calculate the proportion of the UK population who would be unable to distinguish that detail.
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