Disposable Ophthalmic lens

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

Reexamination Certificate

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Reexamination Certificate

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06851808

ABSTRACT:
An ophthalmic lens with high definition, wide field of view and high magnification has, in one embodiment, a contact lens, an intermediate field lens and an image lens wherein a real image is formed inside the field lens. At least two of the lenses contribute to the magnification and three surfaces of the ophthalmic lens are aspheric to provide a better defined image. The ophthalmic lens is made disposable with high quality plastic lenses and a plastic holder. A portion of the holder changes appearance in response to change in environment to indicate that the disposable lens has been used.

REFERENCES:
patent: 3939968 (1976-02-01), Ryder
patent: 4135792 (1979-01-01), Deeg et al.
patent: 4728183 (1988-03-01), Heacock et al.
patent: 5623323 (1997-04-01), Johnson et al.
patent: 5706073 (1998-01-01), Volk
patent: 6634753 (2003-10-01), Rozenman

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