4. Optics: eye examining, vision testing and correcting
  5. Eye examining or testing instrument
  6. Objective type

Carl Murray Penney

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Coaxial spatially resolved refractometer

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

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Coaxial spatially resolved refractometer

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

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Internal color probe

Optics: measuring and testing – By shade or color – With color determination by light intensity comparison
Patent

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Profile ID: LFUS-PAI-P-1050732

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