@article{ref1,
title="Effects of coatings on the fracture resistance of ophthalmic lenses",
journal="Optometry and vision science",
year="1996",
author="Corzine, J. C. and Greer, R. B. and Bruess, R. D. and Lee, G. K. and Scaief, A. L.",
volume="73",
number="1",
pages="8-15",
abstract="BACKGROUND: Scratch-resistant (SR) and anti-reflective (AR) coatings are commonly applied to plastic ophthalmic lenses. Fracture resistance is greatly affected by surface characteristics, and coatings may have a weakening effect. Static load testing is an efficient, quantifiable alternative to the drop ball test and has been suggested as useful for comparing lenses of a given material. METHODS: An Instron static load tester was used to test the fracture resistance of 140 CR-39 lenses divided into 4 groups: uncoated, prepared for AR coating but not actually coated, AR coated, and factory SR coated. RESULTS: Compared to the control uncoated group, AR coating reduced the required fracture energy by 63% and SR coating by 57%. Preparation for AR coating had no significant effect. CONCLUSIONS: These results are at least qualitatively consistent with drop ball testing and have significant implications as new plastic materials are developed, made thinner, and variously coated.<p /><p>Language: en</p>",
language="en",
issn="1040-5488",
doi="",
url="http://dx.doi.org/"
}