US 12,140,820 B2
Method of manufacturing contact lens for treating color vision deficiency
Haider Butt, Abu Dhabi (AE); and Fahad Alam, Abu Dhabi (AE)
Assigned to Khalifa University of Science and Technology, Abu Dhabi (AE)
Filed by Khalifa University of Science and Technology, Abu Dhabi (AE)
Filed on Oct. 12, 2021, as Appl. No. 17/499,251.
Application 17/499,251 is a continuation in part of application No. 17/307,316, filed on May 4, 2021, granted, now 11,899,289.
Prior Publication US 2022/0357594 A1, Nov. 10, 2022
Int. Cl. G02C 7/04 (2006.01); B29D 11/00 (2006.01); B33Y 80/00 (2015.01); G02B 1/12 (2006.01)
CPC G02C 7/049 (2013.01) [B29D 11/00442 (2013.01); B29D 11/00923 (2013.01); B33Y 80/00 (2014.12); G02B 1/12 (2013.01)] 15 Claims
OG exemplary drawing
 
3. A method of forming an ophthalmic contact lens using an additive manufacturing apparatus, comprising:
providing a first solution comprising 2-hydroxyethyl methacrylate (HEMA), polyethylene glycol dimethacrylate (PEGDA), and a photoinitiator;
forming a support structure on a planar print bed of the additive manufacturing apparatus by depositing a first plurality of layers of the first solution and curing the first plurality of layers; and
forming an ophthalmic contact lens on the support structure by depositing a second plurality of layers of the first solution and curing the second plurality of layers; and
forming a plurality of channels on an outermost circumferential edge of the contact lens and extending toward a center of the contact lens, wherein the plurality of channels each have a triangular shape defining an apex at the outermost circumference of the ophthalmic contact lens and wherein the plurality of channels is configured to indicate dry eye conditions due to changes in spacing between the channels or changes in a shape of the channels.