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Contrast chart device, contrast sensitivity measuring device...

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Reexamination Certificate

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Contrast sensitivity function measurement chart and method

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent

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Contrast sensitivity measuring device and contrast...

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Reexamination Certificate

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Contrast sensitivity test

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Reexamination Certificate

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Contrast sensitivity tester

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent

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Crossed cylinder lenses refractor and method of use

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent

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Crossed cylinder lenses refractor with three-lens variable cross

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent

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Cupola-type ophthalmological apparatus the visual field and the

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent

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