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Intra-ocular lens or contact lens exhibiting large depth of focus
Intra-ocular lens or contact lens exhibiting large depth of focus
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机译:聚焦深度大的眼内透镜或隐形眼镜
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摘要
Circular and annular lens zones are disclosed which, at a given lens area, exhibit a depth of focus of a lens of considerably smaller area. The large depth of focus is achieved by imparting the lens zones a refractive power profile. An assembly of such large depth of focus lens zones represents a lens of large diameter which lens, in polychromatic light, exhibits essentially the same depth of focus as the lens zones from which it is composed.
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