发明名称 |
IMPROVED SINGLE VISION LENSES |
摘要 |
Optical lens element with a prescription zone, suitable for use in wraparound or protective type eyewear. The element may also include a peripheral vision zone, with no prismatic jump between the zones. Design methods for the prescription zone include temporally rotating a prescription section about a vertical axis through the optical center thereof, and/or decentring the optical axis of said prescription section relative to the geometric axis thereof, and providing partial surface correction for astigmatic and/or mean power errors. For prescription powers in the range -6.0 to +6.0 diopters with 0 to 3 cyl, the optical lens element may be designed such that its front surface can be mounted in a frame of constant curvature of at least 5.0 diopters, with its back surface providing good clearance from temples and eyelashes. Applications include ophthalmic sunglass lenses.
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申请公布号 |
CA2249584(A1) |
申请公布日期 |
1997.09.25 |
申请号 |
CA19972249584 |
申请日期 |
1997.03.21 |
申请人 |
SOLA INTERNATIONAL HOLDINGS LTD. |
发明人 |
EDWARDS, SIMON JOHN;O'CONNOR, KEVIN DOUGLAS;BARKAN, ERIC F.;SKLAR, DAVID H.;PERROTT, COLIN MAURICE |
分类号 |
A61F9/02;G02C7/02;(IPC1-7):G02C7/02 |
主分类号 |
A61F9/02 |
代理机构 |
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地址 |
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