Multifocal contact lens and method of manufacture thereof
First Claim
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1. An optical zone for a lens, said optical zone having a center optical axis, said optical zone comprising:
- a first region formed within said optical zone and having a first optical curve, said first optical curve having a first optical axis collinear with said center optical axis; and
a plurality of secondary regions formed within said first region, each of said secondary regions having respective secondary optical curves, each of said secondary optical curves having a corresponding secondary optical axis, each said secondary optical axis being collinear with said first optical axis, each of said secondary optical curves being decentered relative to said first optical curve.
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Abstract
An optical zone for a lens has a center optical axis. A first region of the optical zone includes a first optical curve having a first optical axis that is collinear with the center optical axis. A plurality of secondary regions is formed within the first region. Each of the secondary regions has a respective secondary optical curve with a corresponding secondary optical axis. Each secondary optical axis is collinear with the first optical axis. Each of the secondary optical curves is decentered relative to the first optical curve.
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Citations
23 Claims
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1. An optical zone for a lens, said optical zone having a center optical axis, said optical zone comprising:
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a first region formed within said optical zone and having a first optical curve, said first optical curve having a first optical axis collinear with said center optical axis; and
a plurality of secondary regions formed within said first region, each of said secondary regions having respective secondary optical curves, each of said secondary optical curves having a corresponding secondary optical axis, each said secondary optical axis being collinear with said first optical axis, each of said secondary optical curves being decentered relative to said first optical curve. - View Dependent Claims (2, 3, 4, 5)
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6. A contact lens, comprising:
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a body having an anterior and a posterior surface; and
an optical zone defined on said anterior surface, said optical zone having a center optical axis and including a first region and a plurality of second regions, said first region having a first optical curve, said first optical curve having a first optical axis collinear with said center optical axis, said plurality of second regions disposed within said first region, each of said plurality of second regions having respective second optical curves with corresponding second optical axes, said second optical axes being collinear with said first optical axis, each of said secondary optical curves being decentered relative to said first optical curve. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for manufacturing a contact lens, said contact lens having an anterior surface, said method comprising the steps of:
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fabricating a first optical curve on at least a portion of the anterior surface, the first optical curve defining an optical zone of the contact lens, the first optical curve having an optical axis that passes through the center of the optical zone; and
fabricating at least one second optical curve within the optical zone, each at least one second optical curve being decentered relative to the first optical curve by a respective amount, each at least one second optical curve having a respective optical axis that is collinear relative to the optical axis of the first optical curve. - View Dependent Claims (17, 18, 19)
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20. A method of forming a mold tool, the mold tool for use in creating molds for use in molding contact lenses, the method of forming a mold tool comprising:
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fabricating a first optical curve on at least a portion of a first surface of the mold tool, the first optical curve defining a first zone corresponding to an optical zone of the contact lenses, the first optical curve having an optical axis that passes through the center of the optical zone; and
fabricating at least one second optical curve on the first surface of the mold tool and within the first zone, each at least one second optical curve being decentered relative to the first optical curve by a respective amount, each at least one second optical curve having an optical axis that is collinear relative to the optical axis of the first optical curve. - View Dependent Claims (21, 22, 23)
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Specification