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Helping The Partially Sighted - Manual
TEST CHARTS
test chart
Keeler; Keeler, Charles Henry
Europe: United Kingdom
1956
cardboard; metal
overall: 225 x 169 mm
2003.51
TEST CHARTS
test chart
Keeler; Keeler, Charles Henry
Europe: United Kingdom
1956
cardboard; metal
overall: 225 x 169 mm
Series of twelve heavy duty instruction cards in hard-backed ring binder, including Landolt rings, test letter types (Keeler 'A' Series), set of reference tables, illustrated description of a light patch test and catalogue entries for optical magnifiers.
2003.51
Ex Keeler Collection