Ophthalmic device molds and related methods
Ophthalmic device molds made from a first portion of a molding surface formed from a first polymer and a second portion of the molding surface formed from a second polymer are described. When combined, the first portion and the second portion of the molding surface form an entire molding surface suitable for molding an entire surface, such as an anterior surface or a posterior surface of an ophthalmic device. Methods of manufacturing ophthalmic devices using these molds, including contact lenses, are also described.
1. An ophthalmic contact lens mold member including a molding surface configured to form an entire anterior or posterior surface of a contact lens, the molding surface comprising:
(a) a distinct first portion formed of a first polymer, wherein the first polymer is water-soluble, and wherein the distinct first portion is configured to come into direct contact with a polymerizable composition to cast mold a first region of the anterior or posterior surface of the contact lens; and
(b) a distinct second portion formed of a second polymer that is different from the first polymer, wherein the second polymer is essentially insoluble in water, and wherein the distinct second portion is configured to come into direct contact with the polymerizable composition to cast mold a second region of the same anterior or posterior surface of the contact lens, and is configured, in combination with the distinct first portion, to form the entire anterior or posterior molding surface, and wherein the combination of the distinct first portion and the distinct second portion are configured to come into direct contact with the polymerizable composition to cast mold the entire anterior or posterior surface of the contact lens.
2. The ophthalmic contact lens mold member of claim 1 , wherein the first polymer comprises at least one vinyl alcohol copolymer which is not an ethylene-vinyl alcohol copolymer.
3. The ophthalmic contact lens mold member of claim 1 , wherein the second polymer comprises polypropylene.
4. The ophthalmic contact lens mold member of claim 1 , wherein the molding surface is configured to form the entire posterior surface of the contact lens.
5. The ophthalmic contact lens mold member of claim 1 , wherein the distinct first portion of the molding surface is configured to form at least one channel on a surface of the device.
6. The ophthalmic contact lens mold member of claim 1 , wherein the distinct first portion of the molding surface is configured to form at least one channel extending from at least one surface of the device into a body of the device.
7. The ophthalmic contact lens mold member of claim 1 , wherein the second polymer is a non-polar polymer.
8. The ophthalmic contact lens mold member of claim 1 , wherein the first polymer is a water-soluble vinyl alcohol copolymer.
9. The ophthalmic contact lens mold member of claim 1 , wherein the first polymer is a water-soluble vinyl alcohol copolymer and the second polymer is a non-polar polymer.
10. The ophthalmic contact lens mold member of claim 1 , wherein the molding surface is a unitary molding surface.
11. The ophthalmic contact lens mold member of claim 1 , wherein the molding surface is configured to form the entire anterior surface of the contact lens.
12. A contact lens mold assembly comprising the ophthalmic contact lens mold member of claim 1 , and a second ophthalmic contact lens mold member.
13. The contact lens mold assembly of claim 12 , wherein the ophthalmic contact lens mold member is configured to cast mold the entire anterior surface of the contact lens and the second ophthalmic contact lens mold member is configured to cast mold the entire posterior surface of the contact lens.
14. The contact lens mold assembly of claim 12 , wherein the ophthalmic contact lens mold member is configured to cast mold the entire posterior surface of the contact lens and the second ophthalmic contact lens mold member is configured to cast mold the entire anterior surface of the contact lens.
15. The contact lens mold assembly of claim 12 , wherein the ophthalmic contact lens mold member and the second ophthalmic contact lens mold member are configured for temporary attachment to one another.
16. The contact lens mold assembly of claim 12 , wherein the ophthalmic contact lens mold member and the second ophthalmic contact lens mold member are configured for permanent attachment to one another.