Optical viewing device having an apparatus for partial...

Details Optical viewing device having an apparatus for partial... Optical viewing device having an apparatus for partial...

2007-06-26

2007-06-26

Sugarman, Scott J. (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S221000

Reexamination Certificate

active

10078383

ABSTRACT:
The invention concerns an optical viewing device which incorporates a spectral filter to partially reduce the intensity or wavelength(s) of light transmitted to a specific region of a specimen which may be a human eye. The reduction in light intensity or wavelength may be variable across the filter and may be accomplished in an intensity-dependent or a wavelength-dependent manner.

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