Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1994-03-28
1996-05-14
Nelms, David C.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351161, 351168, G02C 706
Patent
active
055172601
ABSTRACT:
An ophthalmic lens including a first zone located in a central portion of the ophthalmic lens such that a central axis intersects the center of the first zone. The first zone having a spherical posterior surface for correcting distance vision. The ophthalmic lens further includes a second zone, positioned about the periphery of the first zone, and having a posterior surface of revolution defined by rotating a portion of a spiral curve about a central axis of the ophthalmic lens. Additionally, the ophthalmic lens may include a third zone positioned about the periphery of the second zone, and having a spherical posterior surface for correcting near vision.
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Glady George E.
Meszaros George K.
Mai Son
Nelms David C.
Vari-Site, Inc.
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