Invention Grant
- Patent Title: Self guided subjective refraction instruments and methods
- Patent Title (中): 自我指导主观折射仪器和方法
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Application No.: US14158926Application Date: 2014-01-20
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Publication No.: US08967801B2Publication Date: 2015-03-03
- Inventor: Shui T Lai
- Applicant: Shui T Lai
- Agency: SF Bay Area Patents, LLC
- Agent Andrew V. Smith
- Main IPC: A61B3/10
- IPC: A61B3/10 ; A61B3/00 ; A61B3/032

Abstract:
A refraction device determines a refraction end point to provide corrective optics for a test subject. The device includes an adjustable optical system providing corrective optics to the test subject and an adjustable viewing target disposed along an optical path such as to be viewable through the adjustable optical system by a test subject. The adjustable viewing target includes a directional indicator linked synchronously to at least two choices of corrective optics presented to the test subject.
Public/Granted literature
- US20140340646A1 Self Guided Subjective Refraction Instruments and Methods Public/Granted day:2014-11-20
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