4. Optics: eye examining, vision testing and correcting
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Rotatable lens eyeglasses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Lens pivots in and out of optical path
Reexamination Certificate

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Rotatable, multi-focus eye glasses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With auxiliary lenses movable in and out of the optical path
Patent

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Rotationally stabilized contact lens and methods of lens stabili

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent

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Rotationally stabilized contact lenses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate

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Rotationally stabilized contact lenses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate

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Rotationally stable contact lens designs

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent

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Rubber-padded frames of eye spectacles and method for preparing

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

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Rugate lens for glasses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate

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Rule based visual field autointerpretation system

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Methods of use
Patent

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