@article{ref1,
title="The effects of target activity, illumination level, distance and age on eye focus time",
journal="Proceedings of the Human Factors and Ergonomic Society annual meeting",
year="1975",
author="Harris, K. S. and Schutz, Rodney K. and Sadosky, T. L.",
volume="19",
number="2",
pages="213-217",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="2169-5067",
doi="10.1177/154193127501900213",
url="http://dx.doi.org/10.1177/154193127501900213"
}