Patent ID: 9304329
Filing Date: 2016-04-05
CPC Classification: A61F,G02B,G02C

Claim Text:
1. A method of correcting vision of an eye, the method comprising: placing a lens along an optical path of the eye, the lens comprising at least one curved surface coupled to a diffractive structure, the diffractive structure comprising a first plurality of substantially monofocal echellettes having a first optical power for a near vision correction and a second plurality of substantially monofocal echellettes having a second optical power for a far vision correction; wherein the first plurality of substantially monofocal echellettes diffracts transmitted light with a first efficiency of at least about 90% for the near vision correction and the second plurality of substantially monofocal echellettes diffracts transmitted light with an efficiency of at least about 90% for the far vision correction, wherein the first plurality of substantially monofocal echellettes has a corresponding first plurality of full period zones and wherein the second plurality of substantially monofocal echellettes has a second plurality of full period zones corresponding to the first plurality of full period zones, wherein the diffractive structure comprises a third plurality of substantially monofocal echellettes having an intermediate optical power for an intermediate vision correction, the third plurality of substantially monofocal echellettes having third heights approximating first heights of the first plurality of substantially mono focal echellettes, the third plurality of substantially monofocal echellettes having a third plurality of full period zones corresponding to the first plurality of full period zones, the first plurality of full period zones having first widths and the third plurality of full period zones having third widths, the third widths corresponding to an integer multiple of two or more of the first widths such that first optical power corresponds to the integer multiple multiplied with the third optical power.