Fig. 20. Adjustments in the Schepens Pomerantzeff ophthalmoscope. A. Standard setting. B. Additional separation in an extra-wide pupil. C. Less separation in a narrow pupil. D. Illuminating beam shifted for peripheral viewing. (Redrawn from Schepens Pomerantzeff Ophthalmoscope: The Unique Optimized Ophthalmoscope. Waltham, MA: Medical Instruments Research Associates, Inc, 1977.)