Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Reexamination Certificate
2007-10-30
2007-10-30
Schwartz, Jordan M. (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
C351S205000, C356S365000
Reexamination Certificate
active
10855196
ABSTRACT:
A scanning laser polarimetry (SLP) system that measures retinal nerve fiber layer (RNFL) retardance in a single scan image with improved sensitivity. An external bias retarder in combination with the anterior segment retardance forms a nonzero joint retardance adapted to enhance the signal-to-noise ratio (SNR) of the SLP system. With such a simple bias retarder, the effects of anterior segment retardance (δC, θC) may be removed from a single polarimetric image of the retina without a direct cancellation by a variable corneal compensator (VCC) by the method of this invention. Using a single polarimetric image is particularly advantageous for simplicity and accurate corneal compensation. The simple bias retarder may be embodied as a VCC or any useful external retarder, for example.
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Huang Xiangrun
Zhou Qienyuan
Carl Zeiss Meditec Inc.
Schwartz Jordan M.
Stallman & Pollock LLP
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