Chapter

Depth from accommodation and vergence

Ian P. Howard

in Perceiving in Depth

Published in print February 2012 | ISBN: 9780199764167
Published online May 2012 | e-ISBN: 9780199949373 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199764167.003.0007

Series: Oxford Psychology Series

Depth from accommodation and vergence

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There has been some debate about whether eye accommodation or defocus blur of the retinal image provide useful information about the distance of an object. The evidence is reviewed. The evidence is then reviewed about the extent to which the angle of convergence of the eyes can be used to perceive the distance of a fixated object. These sources of information are closely linked and can be useful only for near distances because, beyond about 2 m, accommodation and vergence change only slightly.

Keywords: accommodation; image blur; vergence

Chapter.  9811 words.  Illustrated.

Subjects: Neuroscience

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