Invention Grant
- Patent Title: Multifocal ophthalmic lens with discontinuities
- Patent Title (中): 具有不连续性的多焦点眼科镜片
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Application No.: US12859649Application Date: 2010-08-19
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Publication No.: US08434864B2Publication Date: 2013-05-07
- Inventor: Amitava Gupta , Ronald D. Blum
- Applicant: Amitava Gupta , Ronald D. Blum
- Applicant Address: US VA Roanoke
- Assignee: PixelOptics, Inc.
- Current Assignee: PixelOptics, Inc.
- Current Assignee Address: US VA Roanoke
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: G02C7/06
- IPC: G02C7/06

Abstract:
Aspects of the present invention provide multifocal ophthalmic lenses—for example, an ophthalmic lens having a progressive addition optical power region—having one or more discontinuities. The discontinuities can be used to merge or connect regions of the lens surface having different curvatures or average optical power. The use of discontinuities can obviate the need for blend zones which are largely responsible for the introduction of unwanted astigmatism in conventional lenses. In turn, a multifocal ophthalmic lens of the present invention can provide a desired additive power with less unwanted astigmatism than a conventional progressive addition lens (PAL).
Public/Granted literature
- US20110058143A1 MULTIFOCAL OPHTHALMIC LENS WITH DISCONTINUITIES Public/Granted day:2011-03-10
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