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But the amber glasses, with their yellow celluloid side-pieces, were not a mere palliative, as all other glasses had been in our experience, but a complete preventive of snow-blindness. No one of us had the slightest trouble with the eyes, and the eye-washes were never used.
Long experience with blue and smoke-colored glasses upon the trail in spring had led us to expect much irritation of the eyes despite the use of snow-glasses, and we had plentifully provided ourselves with boracic acid and zinc sulphate for eye-washes.
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