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'Supervis' Solid concentric trifocal lens with prismatic near segment
OPHTHALMIC LENSES
trifocal lens
United Kingdom Optical Company Ltd
Europe: United Kingdom
1961
glass
1999.5578
OPHTHALMIC LENSES
trifocal lens
United Kingdom Optical Company Ltd
Europe: United Kingdom
1961
glass
'Supervis' trifocal lens. Round. Plastic (?) Solid concentric segments. Invisible intermediate segment and visible horizontal prismatic near segment.
1999.5578