US 11,833,031 B2
Optimized writing of refractive index structures in IOLs using variable passes
Georg Schuele, Portola Valley, CA (US); David A. Dewey, Sunnyvale, CA (US); Jenny Wang, Mountain View, CA (US); Richard Hofer, Santa Cruz, CA (US); and Alexander Vankov, Mountain View, CA (US)
Assigned to AMO Development, LLC, Irvine, CA (US)
Appl. No. 17/057,687
Filed by AMO Development, LLC, Irvine, CA (US)
PCT Filed Apr. 9, 2020, PCT No. PCT/IB2020/053419
§ 371(c)(1), (2) Date Nov. 22, 2020,
PCT Pub. No. WO2020/208583, PCT Pub. Date Oct. 15, 2020.
Claims priority of provisional application 62/944,328, filed on Dec. 5, 2019.
Claims priority of provisional application 62/832,825, filed on Apr. 11, 2019.
Prior Publication US 2022/0061983 A1, Mar. 3, 2022
Int. Cl. A61F 2/16 (2006.01); A61F 9/008 (2006.01); B29D 11/02 (2006.01)
CPC A61F 2/1656 (2013.01) [A61F 9/008 (2013.01); B29D 11/023 (2013.01); A61F 2009/00897 (2013.01); A61F 2240/001 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for forming a zone of a Fresnel type gradient index lens in an intraocular lens (IOL), the zone having a ring shape and a predefined radial profile of optical pathlength (OPL) difference, the method comprising:
scanning a pulsed laser beam in the IOL in multiple consecutive passes,
wherein in each pass, the laser beam is scanned in concentric circles of varying radii within all of part of the zone,
wherein in each of all except a smallest one of the multiple passes, within a first radius range of the zone, an energy of the pulsed laser beam for each circle is below a predefined maximum energy and is dependent on the predefined radial profile of the OPL difference, and within a second radius range of the zone which is non-overlapping with the first radius range, the energy of the pulsed laser beam for each circle is the predefined maximum energy, and
wherein in the smallest one of the multiple passes, within a first radius range of the zone, the energy of the pulsed laser beam for each circle is below the predefined maximum energy and is dependent on the predefined radial profile of the OPL difference.