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Bishop Harman folding retinoscopy wheel
John Weiss & Son Ltd
mid 20th c.
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Bishop Harman's Refractometer
c.1905
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CL-1 Hand Refractometer
Atago Company Ltd; ChemLab Scientific Products Ltd
1987
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Compound Refractometer / optometer / astigmatism test
Douglas & Wooldridge Ltd (Stourbridge)
1890s
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Compound refractometer slide set and case
Douglas & Wooldridge Ltd (Stourbridge)
1890s
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DeZeng's Refractometer
Cataract Optical Co
Late 19th c.
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Eye Refractometer
Tokyo Kogaku Kikai K. K.
1970s?
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Fournet's Refractometer
Frankham
c.1883
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Harman's Refractometer
S. Maw, Son & Sons
20th c.
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Refracto-Rack
The Rayner Optical Company Limited
1980s
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refractometer slide set
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refractometer slide set
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Snell's Refractometer
Priest & Ashmore
Late 19th c.
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Snell's Refractometer
Priest & Ashmore
Late 19th c.
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Zeiss Parallax Refractionometer (Gullstrand Ophthalmoscope) & case
Carl Zeiss (Jena)
c.1920s
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Zeiss Parallax Refractionometer (Gullstrand Ophthalmoscope) & instrument stand
Carl Zeiss (Jena)
c.1922
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