Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1999-02-26
2000-09-12
Epps, Georgia
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
G02C 704
Patent
active
061167355
ABSTRACT:
The present invention provides a multifocal contact lens capable of giving high vision regardless of unavoidable, unignorable phenomena including lens decentering and the variation of the diameter of the pupil of a person wearing the multifocal contact lens. In a contact lens (1) having a lens curve (2) having an optical zone (7) consisting of near-vision zones for near vision and distance-vision zones for distance vision arranged alternately, concentrically and coaxially with an optical axis (10), the near-vision zones and the distance-vision zones are only a first near-vision zone (N1) including the optical axis (10), a first distance-vision zone (F1) surrounding and contiguous with the first near-vision zone (N1), a second near-vision zone (N2) surrounding and contiguous with the first distance-vision zone (F1), and a second distance-vision zone (F2) surrounding and contiguous with the second near-vision zone (N2).
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Epps Georgia
Schwartz Jordan M.
Seiko Epson Corporation
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