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TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame accessory
Europe: United Kingdom, England, London EC1
Each rack: 63 x 111 mm; box: 72 x 135 x 70 mm
Set of three hand-held curving retinoscopy racks, black metal, each containing five round spherical lenses, one each of 0.25, 0.50, 0.75, 1.00 and 2.00 D.S. One rack contains minus powers marked in white, the other two positive powers marked in red. The minus rack has a fenestrated handle. Contained in their original cardboard box with separate lid.
Gift of Mrs Elizabeth Rickards, 2007