Word: eyewear
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Dates: during 1960-1969
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...against snow blindness for the skier planning any length of time in the sun. Darker or neutral gray lenses with a light transmission averaging 20 per cent will screen the potentially-harmful untraviolet rays. For safety sake, these lenses should be of shatter-resistant safety glass or plastic. Tinted eyewear of ordinary glass offer an additional hazard to the eyes of a skier who falls or grazes a tree limb on a downhill...
...against snow blindness for the skier planning any length of time in the sun. Darker or neutral gray lenses with a light transmission averaging 20 per cent will screen the potentially-harmful ultraviolet rays. For safety make, these lenses should be of shatter-resistant safety glass or plastic. Tinted eyewear of ordinary glass offer an additional hazard to the eyes of a skier who falls or grases a tree limb on a downhill...