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Decentration chart for LVA 21 and 22 Binocular
MANUFACTURING AND DISPENSING EQUIPMENT
centration chart
Keeler
Europe: United Kingdom
1970s?
card
overall: 247 mm x 202 mm
2019.781
MANUFACTURING AND DISPENSING EQUIPMENT
centration chart
Keeler
Europe: United Kingdom
1970s?
card
overall: 247 mm x 202 mm
Selection chart for low vision aids supplied in accordance with the Keeler 'Advanced' mounting method, 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.
2019.781
Gift of Mr Richard Keeler, 2014