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Trial Frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
1930s
metal; celluloid; plastic
overall: 145 mm

Trial frame. White and black-painted metal. Two round eyes suspended from flat browbar adjustable for p.d. by milled control wheels at either end (left wheel missing). Metal nose rest adjustable for height and angle via unusual double set of milled control wheels. Extending flat-section sides with black plastic drop-end covers. White semi-circular celluloid scales to upper and outer edges. Rotating double lens clip in front of each eye, controlled by a milled wheel to the side, and fixed, downward-pointing single lens clip behind each eye.


2017.628

Transferred from the former Museum and Library of Optometry, Aston University / Gift of the family of the late Anthony G. Sabell FCOptom, 2016



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