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Josef F. Bille, Ruth Sahler, Stephen Zhou, Rick Aguilera, David J. Schanzlin; Refractive Index Shaping Of Intraocular Lenses Using The 2 Phase Wrapping Algorithm. Invest. Ophthalmol. Vis. Sci. 2011;52(14):4733.
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The purpose of applying the phase wrapping algorithm to a lens structure is to narrow the necessary lens height to 50um. The thickness of an IOL is about 200um, which limits the capability of the diopter change. The phase wrapping algorithm would allow RIS of an IOL within a thin layer of 50 um, independent of the IOL’s diopter.
An algorithm was established which reduces a normal convex shaped lens to a 50um thin layer by confining multiple zones. Since an optical wave repeats itself with an OPD of , a spatial modulation results with characteristic phase-jumps of 2π.
The phase wrapping algorithm reduces the needed lens height to a thin layer. The thin height of the phase wrapped lens also allows the stacking of different lenses with different characteristics (toric, aspheric), allowing a customized visual outcome.
The phase wrapping algorithm can be used to create an increased amount of diopter adjustment with potentials for toric, aspheric, and multifocal characteristics.
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