Optometry - Journal of the American Optometric Association
Volume 81, Issue 3 , Page 121 , March 2010

A flip of the coin

PII: S1529-1839(10)00062-X

doi: 10.1016/j.optm.2010.02.001

Optometry - Journal of the American Optometric Association
Volume 81, Issue 3 , Page 121 , March 2010