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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
2019.780
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