Contact lenses with blended microchannels
Contact lenses for use in eyes are provided and include a lens body and a plurality of microchannels defined in a posterior face of the lens body. The microchannels are structured to promote effective tear fluid exchange between an exposed surface of the eye and a surface of the eye covered by the lens body. Each of the microchannels preferably includes a substantially junctionless, convex surface along a major portion of a length of the microchannel.
1. A contact lens for use on an eye, the lens comprising:
a flexible, hydrophilic lens body having a posterior face and an anterior face; and
a plurality of microchannels defined in the posterior face of the lens body, the plurality of microchannels defining a substantially continuous wave form circumferentially throughout substantially the entire circumference of the lens, and each of the microchannels being formed by spaced apart and substantially opposing first and second convex surfaces relative to the anterior face, each convex surface being substantially symmetrical.
2. The contact lens of claim 1 wherein the plurality of microchannels defines a substantially continuous, substantially junctionless waveform circumferentially.
3. The contact lens of claim 1 wherein each of the microchannels comprises a microchannel which is substantially junctionless along at least a portion of a length of the microchannel.
4. The contact lens of claim 1 wherein each of the microchannels comprises a microchannel which is substantially junctionless along a major portion of a length of the microchannel.
5. The contact lens of claim 1 wherein the lens body includes an optical zone which is substantially free of the plurality of microchannels.
6. The contact lens of claim 1 wherein the plurality of microchannels comprises microchannels each of which has a width in a range of about 5 degrees and about 30 degrees.
7. The contact lens of claim 1 wherein the plurality of microchannels comprises about 3 to about 200 microchannels.
8. The contact lens of claim 1 wherein the plurality of microchannels comprises about 10 to about 100 microchannels.
9. The contact lens of claim 1 wherein the lens body is structured to enhance tear mixing of post-lens tear film when the contact lens is worn on an eye of an Asian person relative to tear mixing of post-lens tear film provided by an identically structured contact lens worn on an eye of a non-Asian person.
10. The contact lens of claim 1 wherein the microchannels are sized and adapted to promote effective tear fluid exchange between an exposed surface of the eye and a surface of the eye covered by the lens body.
11. The contact lens of claim 1 wherein the lens body is structured to provide enhanced tear mixing of post lens tear film of a person of a desired group of people when worn on an eye of the person relative to a substantially identical contact lens worn by another person of a different group of people.
12. The contact lens of claim 11 wherein the lens body is structured to provide enhanced tear mixing of post-lens tear film of a person of a group of people who have eye or eyelid characteristics specific for the group of people.
13. The contact lens of claim 11 wherein the lens body is structured to provide enhanced tear mixing of post-lens tear film of a person of a group of people who have increased eyelid tension relative to a different group of people.
14. The contact lens of 11 wherein the lens body is structured to enhance tear mixing when the contact lens is worn on an eye of an Asian person relative to tear mixing provided by an identically structured contact lens worn on an eye of a non-Asian person.
15. The contact lens of 11 wherein the lens body is structured to enhance tear mixing when the contact lens is worn on an eye of a non-Asian person relative to tear mixing provided by an identically structured contact lens worn on an eye of an Asian person.
16. The contact lens of claim 1 , wherein the plurality of microchannels are defined only in the posterior face of the lens body.
17. The contact lens of claim 1 , wherein the lens body comprises a silicone hydrogel material.
18. A silicone hydrogel contact lens, comprising:
a flexible lens body having a posterior face and an anterior face, the lens body comprising a silicone hydrogel material; and
a plurality of microchannels defined in the posterior face of the lens body, the plurality of microchannels defining a substantially continuous wave form circumferentially throughout substantially the entire circumference of the lens, and the lens body provides enhanced tear mixing of post lens tear film of a person of a desired group of people when worn on an eye of the person relative to a substantially identical contact lens worn by another person of a different group of people.
19. The contact lens of claim 18 , wherein the lens body is structured to enhance tear mixing of post-lens tear film when the contact lens is worn on an eye of an Asian person relative to tear mixing of post-lens tear film provided by an identically structured contact lens worn on an eye of a non-Asian person.