It was all a trifle unreal-like looking through a Sunglass that was darkened-for around the boat hung always a vague pall of gloom.
"Tarrano the Conqueror"
Raymond King Cummings
He took from his pocket a small Sunglass, and focussed the rays on his hand, but the heat was not intensified sufficiently to burn him.
"The Land of the Changing Sun"
William N. Harben