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LENTILLE INTRA-OCULAIRE TORIQUE AVEC ASTIGMATISME VARIANT SPATIALEMENT
专利权人:
ABBOTT MEDICAL OPTICS INC.
发明人:
申请号:
EP09713653.5
公开号:
EP2245501B1
申请日:
2009.02.19
申请国别(地区):
EP
年份:
2016
代理人:
摘要:
An intraocular lens for correcting or reducing the astigmatism of a cornea includes a pupil that is spatially divided into discrete zones, with each zone having a particular astigmatism magnitude and astigmatism orientation. In one embodiment, the zones all have the same astigmatism magnitude, which is equal and opposite the cornea astigmatism magnitude to within a particular tolerance, such as 0.25 diopters. In one embodiment, some or all of the zones all have different astigmatism orientations, with the angular separation between astigmatism orientations being on the order of the rotational misalignment tolerance of the lens to the cornea. The visual performance of such a lens deteriorates more slowly with rotational misalignment, when compared to a comparable lens having a uniform astigmatism orientation across its entire pupil, leading to more relaxed tolerances for a surgeon that implants the lens.
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