Anti-Fog Solution for Air-Purifying Respirator Lenses
Final rept. Aug-Oct 2007
EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD RESEARCH AND TECHNOLOGY DIR
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The anti-fog efficacy of a topical surfactant solution was assessed. Each of three respirators was tested three times with treated and untreated lenses. Each mask was placed on a heated, wetted headform in an environmentally controlled room for 10 min. Miniature cameras mounted in the headform captured images through the respirator lenses. These images were then processed using a custom software program that specified the Snellen visual acuity based on the amount of lens fogging. Average Snellen visual acuities for the untreated left and right lenses were 20254 and 20261, respectively. For the treated lenses, average acuities were 206 and 205 for the left and right lens, respectively. Thus, the tested surfactant solution decreased lens fogging of an air-purifying respirator.
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