Bausch-lomb Incorporated

Tatvum LLC

Nivedan Tiwari

Krishnakumar Venkateswaran

Lorenzo J Salvatori

Andrew William Jones

Chun Zhan

Lorenzo Salvatori

An intraocular lens includes a base refractive structure having anterior and posterior surfaces that are shaped for producing a first optical power and a diffractive structure formed in one of the surfaces of the base refractive structure including overlapping first and second diffractive patterns over a common aperture for producing second and third optical powers. The second optical power is an uneven division of the third optical power. The first and second diffractive patterns have respective step heights that are separately varied as a function of radial distance from the optical axis over the common aperture.

Distance dominant intraocular lens

An intraocular lens, comprising an optic having an anterior surface and a posterior surface, providing a refractive base power, at least one of the anterior surface and the posterior surface having disposed thereon a profile 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&#x3c0; for 546 nm light. The combined profile defined by the function: z=max (diffractive profile (p1), diffractive profile (p2), diffractive profile (p3)), where p3&#x3e;p2&#x3e;p1.

Intraocular lens having an extended depth of focus

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Irvine, CA, United States of America

Nivedan Tiwari