Definition: the ability of a lens for eyewear to withstand impact, of a 38-inch steel ball dropped 50 ft, without shattering or breaking; criteria for determination of impact resistance are specified by U.S. regulations.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.