| 摘要 |
A series of deformable, accommodating intraocular lenses is disclosed, where the series subtends a range of nominal powers . The capsular bag of the eye exerts a distorting force on the lens, thereby changing its power and allowing for accommodation. A full accommodation range is the lens power that brings a distant object into focus, subtracted from the lens power that brings a near object into focus. Each lens (10) in the series has essentially the same shape, which is optimized to maximize the accommodation range for a given distorting force. Typically, the lenses in the series have a meniscus shape, although plano-convex and bi-convex may also be used, in order to vary the nominal power for each lens in the series, without significantly affecting the accommodation range, a diffraction grating (13) is applied to one or both of the lens surfaces (11, 12) , where the grating power is different for each lens in the series. |
