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Proceedings Paper

Use of the field-of-view evaluation apparatus (FOVEA) for laser eye protection research: capabilities, limitations, and implications
Author(s): Carita A. DeVilbiss; Elmar T. Schmeisser; William R. Ercoline; Naomi Cantu
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Paper Abstract

While the major technological goal of laser eye protection (LEP) is to attenuate any laser radiation that passes through it, consideration of the physical format in which it is realized must not be overlooked. The best protective material can be rendered essentially useless if it does not cover the appropriate field of regard for the wearer To map the visual field of regard (FOR) coverage provided by LEP devices, the field ofview evaluation apparatus (FOVEA) was used The FOVEA is a onemeter radius arc perimeter contaming computer-controlled light emitting diodes at one-degree mtervals Three different mapppings of the visual field can be obtained with this facility (a) the monocular baseline FOR, (b) the accessibility the LEP demonstrates agamst the direct threat (i e , a laser source entering the eye beyond frame edge), and (c) the accessibility to indirect hazard (i e , laser energy reflected from the lens backside entenng the eye) Comparison of the direct and indirect fields of regard demonstrates the wide coverage variation generated by alternate frame styles and differing head shapes. These results need to be intereted with respect to FOVEA limitations. First, the full FOR is mapped without regard for the relative importance of the periphery versus the fovea. Second, the coverage from a particular frame style must be measured and specified with an appropriate range of anthropometric face forms to ensure coverage consistency.

Paper Details

Date Published: 17 May 2001
PDF: 7 pages
Proc. SPIE 4246, Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment, (17 May 2001); doi: 10.1117/12.426714
Show Author Affiliations
Carita A. DeVilbiss, Air Force Research Lab. (United States)
Elmar T. Schmeisser, TASC, Inc. (United States)
William R. Ercoline, TASC, Inc. (United States)
Naomi Cantu, TASC, Inc. (United States)

Published in SPIE Proceedings Vol. 4246:
Laser and Noncoherent Light Ocular Effects: Epidemiology, Prevention, and Treatment
Bruce E. Stuck; Michael Belkin, Editor(s)

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