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Keeler Wide Angle Magnifying Spectacles - Decentration Chart
MANUFACTURING AND DISPENSING EQUIPMENT
centration chart
Keeler
Europe: United Kingdom
1960s?
card
overall: 248 mm x 210 mm

Selection chart for low vision aids, printed as four columns in black on white laminated card, comparing pupillary distance in mm with the appropriate magnification to obtain a particular near pupillary distance.


2019.780

Gift of Mr Richard Keeler, 2014



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