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To the Editor.
—Routine fluorescein angiography occasionally produces an overexposed set of negatives. When these negatives are viewed against a brightly illuminated background, such as an x-ray film view box, glare surrounding the dark photographic image can obscure detail. I have been using a simple device to screen out glare, improving visibility in this situation.
Materials and Methods.
—A thin piece of cardboard is cut to the approximate dimensions of the bottom of a stereo viewer. A hole of approximately the same size as a single angiographic frame is cut in the cardboard so that most of the light coming through the clear film around the image is screened out. A second hole is positioned so that two adjacent frames can be viewed simultaneously when the screen is placed over a strip of angiographic negatives (Figure). Elastic bands allow this device to be hooked onto and removed from a stereo
Boldrey EE. Enhanced Viewing of Dark Fluorescein Angiographic Negatives. Arch Ophthalmol. 1982;100(4):665. doi:10.1001/archopht.1982.01030030667033