Alcon, Inc.

Novartis Ag

Ying Pi

Steve Yun Zhang

Frank Chang

Joseph Michael Lindacher

Junhao Ge

Chandana Kolluru

Adam K Sniady

Augustine Twum Kumi

Yuan Chang

Alice Weimin Liu

Thomas M Moy

Jing Cheng

Michelle Plavnik

Cornelius Daniel Niculas

Yang Zheng

David Borja

Zahra Bassampour

Ethan Leveillee

The invention provides a delamination-resistant embedded silicone hydrogel contact lens having an insert that is embedded in a silicone hydrogel bulk material. The insert is made of a crosslinked polymeric material having a refractive index higher than that of the silicone hydrogel bulk material by at least 0.07 and comprises a diffractive structure disposed on one of the front and back curve surfaces of the insert for providing a diffractive power that contributes to the overall optical power of the contact lens.

Diffractive contact lenses

The invention is directed to an embedded hydrogel contact lens, which comprises an insert sandwiched between two layers of hydrogel materials and can be produced according to a cast molding method including the procedures involving two females halves (FCand FC) and two male halves (BCand BC) and three consequential molding steps involving three molding assemblies: the 1st one formed between FCand BCfor molding an insert; the 2one formed between FCand BCfor molding a lens precursor having the molded insert embedded in a layer of a hydrogel material in a way that the front surface of the molded insert merges with the convex surface of the lens precursor; and the 3rd one formed between FCand BCfor molding an embedded hydrogel contact of the invention.

Method for making embedded hydrogel contact lenses

The present invention general related to a method and a reusable mold for making a contact lens, comprising a first mold half having a first mold surface in contact with a hydrogel contact lens forming composition and a second mold half having a second mold surface in contact with the lens forming composition, wherein the first mold half and the second mold half are configured to receive each other such that a cavity is formed between the first mold surface and the second mold surface, wherein the cavity defines the shape of a contact lens to be molded, wherein the lens forming composition is polymerizable and/or crosslinkable by an actinic radiation, wherein at least one of the mold halves having an absorbing antireflective coating, wherein the reusable mold is a non-plastic mold.

Reusable lens molds and methods of use thereof

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Suwanee, GA, United States of America

Ying Pi