INTRAOCULAR LENS HAVING AN EXTENDED DEPTH OF FOCUS

An intraocular lens (1), comprising an optic (100) having an anterior surface (102) and a posterior surface (104), providing a refractive base power, at least one of the anterior surface and the posterior surface having disposed thereon a profile (150) comprising steps having heights determined by c...

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Bibliographische Detailangaben
Hauptverfasser:	TIWARI, Nivedan, VENKATESWARAN, Krishnakumar
Format:	Patent
Sprache:	eng
Schlagworte:	BANDAGES, DRESSINGS OR ABSORBENT PADS 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 ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PROSTHESES TREATMENT OR PROTECTION OF EYES OR EARS
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Beschreibung
Zusammenfassung:	An intraocular lens (1), comprising an optic (100) having an anterior surface (102) and a posterior surface (104), providing a refractive base power, at least one of the anterior surface and the posterior surface having disposed thereon a profile (150) comprising steps having heights determined by combining three constituent diffractive profiles. The diffractive profiles correspond to powers p1, p2 and p3, the powers being different than one another and each power being a positive power less than about 1D or about 1.25D. Each of the diffractive profiles having step heights causing a phase delay, relative to aqueous fluid, of 0.6 to 1.2 times 2? for 546 nm light. The combined profile defined by the function: z = max (diffractive profile (p1), diffractive profile (p2), diffractive profile (p3)), where p3 > p2 > p1. (Fig. 2)