Invention Grant
- Patent Title: Method and apparatus for subjective refraction
- Patent Title (中): 主观折射的方法和装置
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Application No.: US12703501Application Date: 2010-02-10
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Publication No.: US08226238B2Publication Date: 2012-07-24
- Inventor: Ray Steven Spratt
- Applicant: Ray Steven Spratt
- Applicant Address: US CA Peteluma
- Assignee: Carl Zeiss Vision Inc.
- Current Assignee: Carl Zeiss Vision Inc.
- Current Assignee Address: US CA Peteluma
- Agency: Fish & Richardson P.C.
- Main IPC: A61B3/02
- IPC: A61B3/02
Abstract:
An article for performing a subjective refraction includes a lens having a mean power that varies across the lens in a first direction and a cylindrical power that varies across the lens in a second direction, orthogonal to the first direction, wherein the mean power varies by four diopters or more and the cylindrical power varies by four diopters or more.
Public/Granted literature
- US20110194074A1 METHOD AND APPARATUS FOR SUBJECTIVE REFRACTION Public/Granted day:2011-08-11
Information query
