US 11,944,574 B2
Systems and methods for multiple layer intraocular lens and using refractive index writing
Robert Rosen, Groningen (NL); Franck Emmanuel Gounou, Groningen (NL); Carmen Canovas Vidal, Groningen (NL); and Aixa Alarcon Heredia, Groningen (NL)
Assigned to AMO Groningen B.V., Groningen (NL)
Filed by AMO Groningen B.V., Groningen (NL)
Filed on Apr. 1, 2020, as Appl. No. 16/837,926.
Claims priority of provisional application 62/830,312, filed on Apr. 5, 2019.
Prior Publication US 2020/0315848 A1, Oct. 8, 2020
Int. Cl. A61F 9/008 (2006.01)
CPC A61F 9/00827 (2013.01) [A61F 9/00834 (2013.01); A61F 2009/00851 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A system for improving vision of a subject, the system comprising:
at least one sensor configured to determine a correction to be made to an intraocular lens (IOL) to improve the vision of a subject, wherein the IOL has a first index of refraction;
a control system operatively coupled to the at least one sensor and configured to receive associated sensed data corresponding to the correction to be made to the IOL and to calculate, based on the sensed data:
shape for more than two layers to be formed within the IOL, wherein each of the more than two layers has a different respective shape within the IOL and is configured to improve the vision of the subject;
index of refraction for the more than two layers to be formed within the IOL, wherein each of the more than two layers has a different index of refraction than the first index of refraction, and
parameters for a pattern of laser radiation to be applied to at least one selected area of the IOL to form the more than two; and
a radiation system operatively coupled to the control system and configured to apply focused laser radiation to the IOL to form, within the IOL, the more than two layers based on the calculated shape for the more than two layers, the calculated index of refraction for the more than two layers, and the calculated parameters for the pattern of laser radiation to be applied, wherein as the focused laser radiation goes sequentially through each voxel, a phase shift in refractive index is applied, wherein if a desired phase shift is greater than one wavelength, the desired phase shift is modulated by subtracting the number of whole wavelengths such that the applied phase shift has a value in the range of zero to one wavelength.