4. Optics: eye examining, vision testing and correcting
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Reduced glare scanner

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent

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Reduced glare scanner

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent

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Refractometer for the automatic objective determination of the r

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent

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Refractor cross-cylinder apparatus

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent

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Refractor optical system

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
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Retinometer

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
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