US 11,724,471 B2
Methods for the manufacture of photoabsorbing contact lenses and photoabsorbing contact lenses produced thereby
Brian Aitken, Edison, NJ (US); Jeffrey D. Caltrider, Neptune Beach, FL (US); Leilani K. Sonoda, Atlantic Beach, FL (US); Robert MacDonald Smith, Jacksonville, FL (US); and Donnie J. Duis, Jacksonville, FL (US)
Assigned to Johnson & Johnson Vision Care, Inc., Jacksonville, FL (US)
Filed by Johnson & Johnson Vision Care, Inc., Jacksonville, FL (US)
Filed on Mar. 2, 2020, as Appl. No. 16/805,931.
Claims priority of provisional application 62/825,050, filed on Mar. 28, 2019.
Prior Publication US 2020/0307130 A1, Oct. 1, 2020
Int. Cl. G02C 7/04 (2006.01); B29D 11/00 (2006.01); H05B 45/12 (2020.01); G02C 7/02 (2006.01); G02C 7/10 (2006.01); B29K 105/00 (2006.01); B29K 33/00 (2006.01); B29K 83/00 (2006.01)
CPC B29D 11/00038 (2013.01) [B29D 11/00634 (2013.01); G02C 7/028 (2013.01); G02C 7/04 (2013.01); G02C 7/10 (2013.01); H05B 45/12 (2020.01); B29K 2033/12 (2013.01); B29K 2033/26 (2013.01); B29K 2083/00 (2013.01); B29K 2105/0002 (2013.01); B29K 2995/0018 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for manufacturing a photoabsorbing contact lens, the method comprising:
(a) providing a mold assembly comprised of a base curve and a front curve, the base curve and the front curve defining and enclosing a cavity therebetween, the cavity containing a reactive mixture, wherein the reactive mixture comprises at least one polymerizable monomer, a photoinitiator which absorbs at an activating wavelength, and a photoabsorbing compound which displays absorption at the activating wavelength; and
(b) curing the reactive mixture to form the photoabsorbing contact lens by exposing the reactive mixture to radiation that includes the activating wavelength, wherein the radiation is directed at both the base curve and the front curve of the mold assembly, and wherein the radiation has an intensity at the base curve that is less than 350 percent greater than the radiation's intensity at the front curve.