@article{ref1,
title="Psychological factors in visual acuity",
journal="American journal of optometry and archives of American Academy of Optometry",
year="1952",
author="Fry, G. A.",
volume="29",
number="12",
pages="624-630",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9408",
doi="",
url="http://dx.doi.org/"
}