Simple Horizontal Phoria Measurement Device
 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 |