Invention Grant
- Patent Title: Pseudo-accommodative IOL having diffractive zones with varying areas
- Patent Title (中): 具有变区的衍生区的假调节性IOL
-
Application No.: US11350497Application Date: 2006-02-09
-
Publication No.: US07441894B2Publication Date: 2008-10-28
- Inventor: Xiaoxiao Zhang , Steve VanNoy , Xin Hong
- Applicant: Xiaoxiao Zhang , Steve VanNoy , Xin Hong
- Applicant Address: US TX Fort Worth
- Assignee: Alcon Manufacturing, Ltd.
- Current Assignee: Alcon Manufacturing, Ltd.
- Current Assignee Address: US TX Fort Worth
- Agent Armando Pastrana, Jr.
- Main IPC: G02C7/06
- IPC: G02C7/06 ; A61F2/16

Abstract:
In one aspect of the invention, a trifocal ophthalmic lens is disclosed that includes an optic having at least one optical surface, and a plurality of diffractive zones that are disposed on a portion of that surface about an optical axis of the optic. At least two of those diffractive zones have different areas so as to cause broadening of optical energy profiles at a near and a far foci of the diffractive zones for generating an intermediate focus.
Public/Granted literature
- US20070182921A1 Pseudo-accommodative IOL having diffractive zones with varying areas Public/Granted day:2007-08-09
Information query