US 11,718,052 B2
Contact lenses for reducing myopia and methods for making the same
Thomas W. Chalberg, Jr., Menlo Park, CA (US)
Assigned to SightGlass Vision, Inc., Palo Alto, CA (US)
Appl. No. 16/612,319
Filed by SIGHTGLASS VISION, INC., Palo Alto, CA (US)
PCT Filed May 8, 2018, PCT No. PCT/US2018/031506
§ 371(c)(1), (2) Date Nov. 8, 2019,
PCT Pub. No. WO2018/208724, PCT Pub. Date Nov. 15, 2018.
Claims priority of provisional application 62/502,992, filed on May 8, 2017.
Prior Publication US 2020/0241325 A1, Jul. 30, 2020
Int. Cl. B29D 11/00 (2006.01); G02C 7/04 (2006.01)
CPC B29D 11/00048 (2013.01) [B29D 11/00038 (2013.01); G02C 7/049 (2013.01); G02C 2202/24 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of making a contact lens, the method comprising:
dispensing a first lens material to a first mold part comprising a concave mold surface, the first lens forming material comprising an optically transparent material and a plurality of particles which form a plurality of light scattering centers of the contact lens;
pressing a second mold part comprising a convex mold surface to the first mold part to cause the first lens material to conform to the concave mold surface and the convex mold surface;
applying conditions sufficient for the first lens material to take on and maintain a shape formed by the concave mold surface and the convex mold surface to produce a molded part, wherein the light scattering centers are distributed through a central region and a peripheral region of the molded part, and the molded part forms at least part of a body of the contact lens;
forming a hole in the central region of the molded part;
filling the hole with a second lens material comprising the optically transparent material to form a clear aperture of the contact lens;
pressing the second mold part to the first mold part to cause the second lens material to conform to the concave mold surface of the first mold part and the convex mold surface of the second mold part; and
applying conditions sufficient for the second lens material to form the clear aperture of the contact lens between the concave mold surface and the convex mold surface.