发明授权
US06511178B1 Multifocal ophthalmic lenses and processes for their production 有权
多焦点眼科镜片及其生产工艺

Multifocal ophthalmic lenses and processes for their production
摘要:
The invention provides lenses that have zones of more than one optical power, or focal length, and a smooth transition between the zones of differing power.
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