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OPDSG Posner Diagnostic and Surgical Gonioprism ('four mirror' gonioscopy lens)
OPTOMETRIC INSTRUMENTS
slit lamp accessory
Ocular Instruments Inc.
North America: USA, Washington, Bellevue
c.1983
glass; plastic; wood; metal
case: 43 mm x 130 mm x 50 mm; handle: 72 mm; lens: 12 mm x 26 mm x 24 mm

Lens for use in gonioscopy set within black conical holder, with three internal mirrrors. Together with a compartmentalised wooden storage case with hinged lid and white metal clasp.


2015.250

Gift of Mr David Shannon MCOptom, 2015



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