Multifocal diffractive ophthalmic lenses

A lens according to the invention has diffractive power and two primary foci, where one focus is associated with the first diffractive order and one with the second diffractive order.

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Bibliographic Details
Main Authors FUTHEY, JOHN A, SIMPSON, MICHAEL J
Format Patent
LanguageEnglish
French
German
Published 12.02.1992
Subjects
BANDAGES, DRESSINGS OR ABSORBENT PADS
CONTACT LENSES
DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS
FILTERS IMPLANTABLE INTO BLOOD VESSELS
FIRST-AID KITS
FOMENTATION
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES
PHYSICS
PROSTHESES
SPECTACLES
SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
TREATMENT OR PROTECTION OF EYES OR EARS
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Summary:A lens according to the invention has diffractive power and two primary foci, where one focus is associated with the first diffractive order and one with the second diffractive order.
Bibliography:Application Number: EP19910307213