Spectacle Lens, Spectacle Lens Design Method, and Design Apparatus
First Claim
Patent Images
1. A spectacle lens comprising:
- a first region which is located in at least part of a portion of the lens where a pivotal angle of an eyeball of a wearer ranges from 20 to 60 degrees and in which correcting astigmatism has priority over correcting average power based on prescribed power; and
a second region which is formed inside the first region and in which correcting the average power has priority over correcting the astigmatism.
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Abstract
A spectacle lens includes a first region which is located in at least part of a portion of a lens where a pivotal angle of an eyeball of a wearer ranges from 20 to 60 degrees and in which correcting astigmatism has priority over correcting average power based on prescribed power, and a second region which is formed inside the first region and in which correcting the average power has priority over correcting the astigmatism.
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Citations
10 Claims
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1. A spectacle lens comprising:
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a first region which is located in at least part of a portion of the lens where a pivotal angle of an eyeball of a wearer ranges from 20 to 60 degrees and in which correcting astigmatism has priority over correcting average power based on prescribed power; and a second region which is formed inside the first region and in which correcting the average power has priority over correcting the astigmatism. - View Dependent Claims (2, 3, 4, 5)
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6. A spectacle lens design method comprising:
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providing a first region which is located in at least part of a portion of the lens where a pivotal angle of an eyeball of a wearer ranges from 20 to 60 degrees and in which correcting astigmatism has priority over correcting average power based on prescribed power; and providing a second region which is formed inside the first region and in which correcting the average power has priority over correcting the astigmatism. - View Dependent Claims (7, 8)
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9. A spectacle lens design apparatus comprising:
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a unit that acquires eyeglass specifications including prescribed power; a first unit that designs a first region which is located in at least part of a portion of the lens where a pivotal angle of an eyeball of a wearer ranges from 20 to 60 degrees and in which correcting astigmatism has priority over correcting average power based on the prescribed power; and a second unit that designs a second region which is located inside the first region and in which correcting the average power has priority over correcting the astigmatism. - View Dependent Claims (10)
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Specification