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Proceedings Paper

Visual Sensitivity To Temporal Change In Focus And Its Relevance To The Accommodation Response
Author(s): W. N. Charman; G. Walsh
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Paper Abstract

It is well known that the steady-state accommodation response varies with the spatial frequency content of the observed object: in general the response does not exactly match the stimulus and small 'lags' and 'leads' in accommodation are found, depending upon the stimulus level, the observer and the observing conditions. It has been hypothesisedl-J that the establishment and maintenance of the steady-state response may depend upon the temporal changes in the retinal image caused by the small temporal changes, or fluctuations, in accommodation which are known to be an intrinsic part of the system and which have frequencies up to a few Herz and amplitudes of about 0.1 dioptre. To establish the feasibility of such hypotheses it is necessary to determine the sensitivity of observers to temporal change in the focus of the retinal image, as a function of the mean position of focus. Campbell 4 provided some early evidence that sensitivity to temporal focus change was of the right order of magnitude to support the general concept and the present study sought to explore such sensitivity in more detail.

Paper Details

Date Published: 1 January 1987
PDF: 2 pages
Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); doi: 10.1117/12.967149
Show Author Affiliations
W. N. Charman, University Of Manchester Institute (United Kingdom)
G. Walsh, University Of Manchester Institute (United Kingdom)


Published in SPIE Proceedings Vol. 0813:
Optics and the Information Age

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