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TitleMakerDate Made
'Aphax' bifocal lensEssilor20th c.View
'Atoz' prism-controlled solid bifocal lensStigmat Ltd1950s?View
'Atoz' prism-controlled solid bifocal lensStigmat Ltd1950s?View
'Bi-Liptic' solid bifocal lensView
'Bi-Liptic' solid bifocal lensView
'Clarlet' bifocal lensZeiss20th c.View
'Duopal' C25 fused bifocal lensZeissView
'Duopal' SL C25 Mid-Index fused bifocal lensZeissMid-late 20th c.View
'Executive' (E-type) solid bifocal lens20th c.View
'Executive' (E-type) solid double bifocal lens20th c.View
'Franklin-type' Split Bifocal lensView
'Ful-Vue' fused bifocal lensAmerican Optical CoView
'Glaukar' C40 fused bifocal lensZeiss20th c.View
'Hi Drop' bifocal lensSola Optical CoView
'Hi-Drop' bifocal lensSola Optical CoView
'Highlite' solid bifocal lensc.1970sView
'Igard' solid bifocal lensCombined Optical Industries Ltd1947View
'Invisible' upcurve solid bifocal lensView
'Luxe' invisible solid downcurve bifocal lensView
'Luxe' invisible solid downcurve bifocal lensView
'Luxe' invisible solid downcurve bifocal lensView
'Multifield' lenticular bifocal lens20th c.View
'Myoplet' lenticular bifocal lens20th c.View
'Norbond' cemented bifocal lens: round segment20th c.View
'Omega' bifocal lensEssilor20th c.View
'Orma Télégic' bifocal lensEssilor1961View
'Orma Télémilaric' bifocal lensEssilor20th c.View
'Orma Telex' bifocal lensEssilor1958View
'Orma' bifocal lensEssilor20th c.View
'Panoptik' fused bifocal lensView
'Perfection' Split Bifocal lensView
'Solette' monaxial solid bifocal lensView
'Stigmalentic' lenticular bifocal lens20th c.View
'Tangal' no-jump solid downcurve bifocal lensCarl Zeiss (Jena)20th c.View
'Tru-tilt' bi-planar solid bifocal lensCourmettes, H.20th c.View
'Ultex' invisible solid downcurve bifocal lens (replica)c.1990View
Adite Lenticular Aspheric bifocal lens20th c.View
Aspheric Lenticular bifocal lens20th c.View
Bi-Liptic Bi-Focal LensesEarly 20th c.View
bifocal lensSola Optical Co20th c.View
bifocal lensArmorliteView
Bifocal lens20th c.View
Bifocal lens20th c.View
bifocal lensMid-Late 20th c.View
Bivue fused bifocal lensM. Wiseman & Company Ltd1950sView
Bivue fused bifocal lensM. Wiseman & Company LtdMid 20th c.View
Bivue fused bifocal lensM. Wiseman & Company Ltdc.1954-1955View
Cemented bifocal lens: 'Jump-Free' crescent segmentView
Cemented bifocal lens: 'Wafer' segmentView
Cemented bifocal lens: Crescent segmentView
Cemented bifocal lens: Prismatic segmentView
Cemented bifocal lens: Straight-top segmentView
Charles Hymans' upcurve solid bifocal lensesView
Early 'Kryptok' fused bifocal lensKryptok LtdView
Early 'Kryptok' fused bifocal lensKryptok Ltd; C. W. Dixey & Son LtdView
Early fused bifocal lensZeissView
Fused bifocal lensView
fused bifocal lens1950s?View
Hoya 'Alpha' D28 bifocal lens20th c.View
Hoya Super-CT28 fused bifocal lens20th c.View
Hyperaspheric bifocal lensLate 1970s/early 1980sView
Invisible solid concentric double bifocal lensView
Invisible solid concentric step down bifocal lensView
Invisible solid downcurve bifocal lensView
Invisible-segment fused bifocal lensView
Kryptok Patent BifocalEarly-mid 20th c.View
L.V.A. bifocal lensSola Pilkingtonc.1979-1993View
L.V.A. bifocal lensView
L2CT28 fused bifocal lensHoya Lens UK Ltd20th c.View
Lenticular bifocal lens20th c.View
Multifield bifocal lens20th c.View
Nikon-Stigmat ER solid bifocal lensNikonView
Norlite S28 bifocal lensNorville Optical Company Limited20th c.View
pair of 'Perfex' fused bifocal lensesTitmus1959View
Part-manufactured fused bifocal lensesLate 20th c.View
Part-manufactured solid bifocal lensesLate 20th c.View
Polycarbonate bifocal lens20th c.View
Prism-controlled bifocal lensSB Optical Ltd1995View
Prism-controlled fused bifocal lensView
Prism-controlled fused bifocal lensView
Progressive Upcurve bifocal lensEmil Busch AG20th c.View
R5 and R9 fused bifocal lenses in spectacle frameView
Ribbon-segment fused bifocal lensView
Semi-visible solid downcurve bifocal lens20th c.View
set of bifocal lenses & caseLink20th c.View
Set of Sutcliffe cemented bifocal lenses: oval segmentsSutcliffe, RobertEarly 20th c.?View
Sutcliffe Visible solid downcurve bifocal lens (prototype)Sutcliffe, John HamerPost 1901View
Sutcliffe Visible solid downcurve bifocal lens (prototypes)Sutcliffe, J.H.c.1901View
Two 'invisible' upcurve solid bifocal lensesMoussier Boulland & CiePost 1849View
Univis (type) fused bifocal lens with compensating prismView


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