US 12,379,611 B2
Diffractive contact lenses
Zahra Bassampour, Alpharetta, GA (US); Chandana Kolluru, Suwanee, GA (US); Steve Yun Zhang, Sugar Hill, GA (US); Adam K. Sniady, Lilburn, GA (US); Thomas M. Moy, Cumming, GA (US); Frank Chang, Cumming, GA (US); David Borja, Suwanee, GA (US); Joseph Michael Lindacher, Suwanee, GA (US); and Ying Pi, Suwanee, GA (US)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Jun. 13, 2022, as Appl. No. 17/838,358.
Claims priority of provisional application 63/210,193, filed on Jun. 14, 2021.
Prior Publication US 2023/0004023 A1, Jan. 5, 2023
Int. Cl. C08G 77/14 (2006.01); C08J 3/075 (2006.01); G02C 7/04 (2006.01)
CPC G02C 7/049 (2013.01) [C08G 77/14 (2013.01); C08J 3/075 (2013.01); G02C 7/041 (2013.01); C08J 2483/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An embedded silicone hydrogel contact lens, comprising:
a silicone hydrogel bulk material and an insert embedded therein,
wherein the insert is made of a crosslinked polymeric material having a first refractive index, wherein the silicone hydrogel bulk material has a second refractive index, wherein the first refractive index is at least 0.07 higher than the second refractive index,
wherein the insert has a front curve surface, an opposite back curve surface and a diameter of less than 13.0 mm, wherein the insert is located in a central portion of the embedded hydrogel contact lens and comprises a diffractive structure disposed on one of the front and back curve surfaces for providing a diffractive power that contributes to the overall optical power of the contact lens, wherein the diffractive structure is buried inside the silicone hydrogel bulk material,
wherein the embedded silicone hydrogel contact lens is not susceptible to delamination as demonstrated by being free of bubble when being inspected under microscopy at interfaces between the insert and the silicone hydrogel bulk material within the embedded silicone hydrogel contact lens after being autoclaved in a packaging solution in a sealed package for about 45 minutes at 121° C., wherein the packaging solution is a phosphate buffered saline having a pH of 7.1±0.2.