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P. D. gauge
OPTOMETRIC INSTRUMENTS
pupillometer
brass; steel
1999.4625
OPTOMETRIC INSTRUMENTS
pupillometer
brass; steel
P.D. gauge. Brass and blued steel frame. Adjustable nose, nasal projection and P.D. Various engraved scales. One brass adjusting wheel (a second is missing). Pupil gauges slide along brow bar. Thin bowed straight sides with oval loops at ends.
1999.4625