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Trial Frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Early 20th c.
metal; celluloid
overall: 55 mm x 180 mm

Trial frame. White metal. Two round eyes suspended in close proximity from flat browbar adjustable for p.d. by milled control wheels at either end. Nose rest adjustable for height and angle, with brown-headed adjustment screw. Thin square-section sides, with spatula ends. Semi-circular scales to upper edges. Rotating single lens clip in front of each eye and single fixed lens clip behind each eye.


2017.622

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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