BIFOCAL CONTACT LENS

A contact lens having near vision and distance vision portions, the lens bei ng movable on the eye between first and second positions, those positions corresponding with aligning the wearer's vision through the near vision and distance vision portions respectively. The lens is positionally stab...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BRENT, GEOFFREY PETER, EVANS, SIMON RODNEY, EHRMANN, KLAUS, PERERA, SANDYA INDRANI, TAN, JACQUELINE, DU TOIT, RENEE, FALK, DARRIN MARK, HO, ARTHUR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CONTACT LENSES OPTICS PHYSICS SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
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Beschreibung
Zusammenfassung:	A contact lens having near vision and distance vision portions, the lens bei ng movable on the eye between first and second positions, those positions corresponding with aligning the wearer's vision through the near vision and distance vision portions respectively. The lens is positionally stable on th e eye in each of the two positions, and requires a force to be applied to the lens to move between the first and second positions. Preferably the lens has a back surface and a front surface, and said back surface has either one or tw o major back curve zones occupying a major portion of the lens back surface.