Red adaptation goggles
Encyclopedia
Red adaptation goggles were first invented by Wilhelm Trendelenburg
Wilhelm Trendelenburg
Ernst Wilhelm Theodor Trendelenburg was a German physiologist.- References :...

 in 1916 for early radiologists to use to adapt their eyes to view the light produced by fluorescent screens during fluoroscopic procedures. The concept is based on the work by Antoine Beclere on dark adaptation of the eye
Human eye
The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth...

, where it is noted that fluoroscopy relies the use of the retinal rods of the eye. Since retinal rods are insensitive to long wavelengths of light, such as red light, while retinal cones are not, the goggles enabled the physicians to adapt their eyes in preparation for the fluoroscopic procedure while still being able to perform other work. Prior to the invention of these goggles, physicians were required to sit in the darkened room where the procedure would be performed for extended periods to adapt their eyes to the low lighting conditions.
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