@article{ref1,
title="The history of slit and pinhole spectacles",
journal="Clinical and experimental optometry",
year="1932",
author="Barnes, R. J.",
volume="15",
number="6",
pages="34-38",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0816-4622",
doi="10.1111/j.1444-0938.1932.tb01100.x",
url="http://dx.doi.org/10.1111/j.1444-0938.1932.tb01100.x"
}