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Bishop Harman folding retinoscopy wheel
OPTOMETRIC INSTRUMENTS
refractometer
John Weiss & Son Ltd
Europe: United Kingdom, England, London
mid 20th c.
metal
overall: 135 x 47 cm
2003.315
OPTOMETRIC INSTRUMENTS
refractometer
John Weiss & Son Ltd
Europe: United Kingdom, England, London
mid 20th c.
metal
overall: 135 x 47 cm
Two lens discs joined on a hinged bracket. Black metal. Each disc has six round lenses (one disc positive, one disc negative) and two ancillary lenses on a fold-down mount behind. Plus lenses marked in red, minus lenses marked in white.
2003.315
Ex Keeler Collection