@article{ref1,
title="Density of human lens pigmentation: in vivo measures over an extended age range",
journal="Vision research",
year="1972",
author="Coren, S. and Girgus, J. S.",
volume="12",
number="2",
pages="343-346",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}