Simple Horizontal Phoria Measurement Device
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Catalogue Number: 4192
Simple Horizontal Phoria Measurement Device
Category: Equipment
Sub-Category: Tests of binocular vision
Practice/Business: Werner's Optometrist
Year Of Publication/Manufacture: c 1950
Time Period: 1940 to 1999
Place Of Publication/Manufacture: Melbourne
Publisher/Manufacturer: Werner's Optometrist
Description Of Item: Home-made black gloss painted T shaped wooden device 380 mm long with 225 mm wide crosspiece designed to hold an ivorine card engraved with a downward pointing arrow centred between two scales starting from 2 centrally to 20. Left scale in black, right scale in red. A chin or brow rest has disintegrated over time and been removed. A small timber handle is attached at the bottom of the T stem.
Historical Significance: This device could be used with loose vertical prism to measure horizontal phorias, however existence of a septum to dissociate the eyes is not evident. It may have been attached to the missing chin or brow rest.
How Acquired: Donated by Helen Robbins
Date Acquired: 4/4/2022
Condition: Fair
Location: Archive room. West wall. Unit 4 Drawer 5
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