发明名称 |
Progressive reading and intermediate distance lens defined by employment of a zernike expansion |
摘要 |
There is provided a lens that includes a surface having a continuous monotonic change of power through (a) a first zone for reading at a distance of about 35 centimeters to about 45 centimeters from said lens through (b) a second zone for viewing at near and intermediate distances from about 45 centimeters to about four meters from said lens. The second zone includes a corridor having a length of greater than or equal to about 16 millimeters and a width of greater than or equal to about 6 millimeters along said length. The lens has surface astigmatism less than or equal to about 0.5 diopter within said corridor, and is a progressive addition lens.
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申请公布号 |
US8382282(B2) |
申请公布日期 |
2013.02.26 |
申请号 |
US20080740172 |
申请日期 |
2008.10.30 |
申请人 |
VISIONWARE LLC;LYTLE JOHN D. |
发明人 |
LYTLE JOHN D. |
分类号 |
G02C7/00;G02C7/02;G02C7/06 |
主分类号 |
G02C7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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