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US 6,659,607 B2Granted
Contact lens
AssigneeMenicon Co., Ltd.
InventorsKazuya Miyamura, Keiji Sugimoto, Tadashi Sawano, Shigeyasu Nagai, Asaki Suzaki, Hideaki Kondo
Life of this patent
Estimating the term…
Abstract
Disclosed is a contact lens including an optical zone having a substantially circular shape; an peripheral zone having an annular shape and located around the optical zone; and an intermediate zone having an annular shape and located between the optical and peripheral zones. The intermediate zone including a convex portion formed in at least one radial position of a back surface thereof so as to extend in a circumferential direction thereof with an outwardly curved surface as seen in a diametrical cross-section of the lens.
Claims21
A contact lens comprising:
- an optical zone having a generally circular shape;
- an peripheral zone having a generally annular shape and located around said optical zone;
- and
- an intermediate zone having a generally annular shape and interposed between said optical and peripheral zones,
- wherein said intermediate zone has a back surface provided with a convex portion formed in at least one diametrical position thereof and extending in a circumferential direction thereof with an outwardly curved surface in diametric cross section of said contact lens.
2 more elements
Dependencies are inferred from the claim text.