发明公开
- 专利标题: TORIC LENS WITH AXIS MISLOCATION LATITUDE.
- 专利标题(中): 具有轴偏差的TORIC镜头。
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申请号: EP92917157申请日: 1992-08-07
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公开(公告)号: EP0597994A4公开(公告)日: 1994-09-14
- 发明人: NEWMAN STEVE
- 申请人: CAPRICORNIA CONTACT LENS
- 专利权人: CAPRICORNIA CONTACT LENS
- 当前专利权人: CAPRICORNIA CONTACT LENS
- 优先权: AUPK767591 1991-08-09
- 主分类号: G02C7/04
- IPC分类号: G02C7/04
摘要:
A toric lens for axis mislocation correction having optical topography on the surface/s of the lens which induces a depth of field effect on the eye and enables the axis of powers on the lens to align with those on the eye of the wearer such that it neutralises mislocation error if the lens mislocates 1 degree or more. The lens is thin enough to allow sufficient oxygen transmission therethrough to provide satisfactory morphology of the eye of a wearer. The optical topography which induces the depth of field effect comprises either aspheric topography, spline curve functions, diffractive optics using eschelets or bi-refringence optics.
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