Method of manufacturing contact lens for treating color vision deficiency

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, wherein the second plurality of layers are arranged such that a vertical axis of the ophthalmic contact lens is oriented generally perpendicular to the planar print bed of the additive manufacturing apparatus and a principal axis of the ophthalmic contact lens is oriented generally parallel to the planar print bed of the additive manufacturing apparatus, wherein a first thickness of each layer in the first plurality of layers is thicker than a second thickness of each layer in the second plurality of layers;
• providing an ophthalmic contact lens having a plurality of channels on an outermost circumference of the contact lens which extend toward a center of the contact lens, wherein the plurality of channels each have a triangular shape having an apex at the outermost circumference;
• and determining dry eye conditions by observing changes in the shape of the channels.

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.