An additive phoroptor, from the American Optical Company. The apparatus measures 25.5 x 21 cm, and is housed in a black cloth drawstring bag. The eye pieces are marked "Denzeng." The item is in good condition.
Medical Museum Collection, Box 28
One of two digital photographs (with 77-271_1_2.jpg) of a phoroptor. In this view, the apparatus is shown laying atop its protective black cloth bag against a light tan background.