Diffractive Intraocular Lens
An IOL, comprising a first diffractive region, and a second diffractive region having a power of a different magnitude than the first diffractive region, the first region adapted to diffract substantially all light at a first selected wavelength projected therethrough into a single order of diffraction, and the second region adapted to diffract substantially all light at a second selected wavelength projected therethrough into a single order of diffraction.
1 . An IOL, comprising:
a first diffractive region; and
a second diffractive region having a power of a different magnitude than the first diffractive region, the first region adapted to diffract substantially all light at a first selected wavelength projected therethrough into a single non-zero order of diffraction, and the second region adapted to diffract substantially all light at a second selected wavelength projected therethrough into a single non-zero order of diffraction.
2 . The IOL of claim 1 , further comprising a third diffractive region having a power of different magnitude than the first and the second regions, adapted to diffract substantially all light at a third selected wavelength projected therethrough into a corresponding single non-zero order of diffraction.
3 . The IOL of claim 1 , wherein the first region and the second region project light into corresponding first orders of diffraction.
4 . The IOL of claim 1 , wherein the first and second regions are disposed concentrically.
5 . The IOL of claim 1 , wherein the IOL comprises one or more haptics.
6 . The IOL of claim 1 , wherein the IOL is made of a material comprising at least one of silicone, PMMA, foldable hydrophilic acrylic and foldable hydrophobic acrylic.
7 . The IOL of claim 4 , further comprising a third region that is concentric with the first and second regions, wherein the first region, the second region, and the third region form alternating regions of near and far focus.
8 . The IOL of claim 1 , wherein the first selected wavelength and the second selected wavelength are at substantially a same wavelength in the visible spectrum.
9 . The IOL of claim 1 , wherein the first selected wavelength and the second selected wavelength are at a same wavelength in the visible spectrum.
10 . The IOL of claim 1 , wherein the same wavelength is approximately 555 nm.
11 . A method, comprising:
projecting light of a selected wavelength onto a first diffractive region and a second diffractive region of an IOL, the first region having a first diffractive optical power and the second region having a second diffractive optical power of a different magnitude than the first diffractive optical power;
diffracting substantially all light of a first selected wavelength projected onto the first region into a single non-zero order of diffraction; and
diffracting substantially all light of a second selected wavelength projected onto the second region into a single non-zero order of diffraction.
12 . The method of claim 11 , wherein the first selected wavelength and the second selected wavelength are at substantially a same wavelength in the visible spectrum.
13 . The method of claim 11 , wherein the first selected wavelength and the second selected wavelength are at a same wavelength in the visible spectrum.
14 . The method of claim 13 , wherein the same wavelength is approximately 555 nm.