公开(公告)号：US20230384482A1

公开(公告)日：2023-11-30

申请号：US18321828

申请日：2023-05-23

Applicant: Alcon Inc.

Inventor： Robert Carey Tucker ,  Pushkar S. Varde ,  Weihong Lang ,  Paul William Oyler

IPC: G02B1/04 ,  G02C7/04 ,  B29D11/00

CPC classification number: G02B1/043 ,  G02C7/04 ,  B29D11/00125

Abstract: The invention is directed to a sandwich colored hydrogel contact lenses lens, comprising: a pupil section, a generally annular iris section surrounding the pupil section, wherein the iris section having at least one colored, printed, opaque, intermittent pattern, wherein the said pattern is covered by a clear donut shape-layer layer, wherein the clear donut shape-layer layer is on inner surface of lens to the observer and has a thickness at least 25 μm. And the method make such lenses using a common polypropylene base curve (BC Mold 1) and two different front curve molds (FC Mold 1, FC Mold 2) that provided different volume gaps to accommodate the size requirements of the two layers.