@article{ref1,
title="Age differences in spatial contrast sensitivity are not the result of changes in subjects' criteria or psychophysical performance",
journal="Optometry and vision science",
year="1994",
author="Yager, Dean and Beard, B. L.",
volume="71",
number="12",
pages="778-782",
abstract="PURPOSE: To analyze separately the sensory and nonsensory aspects of reductions in contrast sensitivity with age. METHODS: Two-alternative forced choice psychometric functions were fitted with a three-parameter Weibull function, which independently estimated threshold, slope, and upper asymptote of the functions. RESULTS: There were no changes in slope or upper asymptote with age, but contrast sensitivity decreased with age. CONCLUSIONS: Most studies of decreased visual function in the elderly are difficult to interpret because possible nonsensory effects are ignored. This paper illustrates a method that can be used to demonstrate a true sensory decline with age.<p /><p>Language: en</p>",
language="en",
issn="1040-5488",
doi="",
url="http://dx.doi.org/"
}