Eye treatment devices and methods
Devices can be implanted in an eye to treat a dry eye condition. The devices include a body defining a lumen and having first and second ends and external and lumenal surfaces. The body has a length sufficient to provide fluid communication between the anterior chamber and tear film of the eye through the lumen when the device is implanted in the sclera. In some embodiments, the device is filterless. In some embodiments, a filter is included. The dry eye treatment devices provided herein prevent bacterial ingress, provide outflow resistance to retain a normal intraocular pressure, and provide moisture (e.g., aqueous humor) to an otherwise dry eye. Methods of treating a dry eye condition wherein the device is implanted in the sclera of an afflicted eye are also described.
1. A device for treating an eye condition, the device comprising:
a body having a distal end portion, a proximal end portion, and a mid-body portion extending between the distal end portion and the proximal end portion, the body defining a lumen extending along a longitudinal axis of the body between the distal end portion and the proximal end portion, the body having external and lumenal surfaces, the body having a longitudinal length sufficient to provide fluid communication between an anterior chamber and a tear film of the eye through the lumen when the device is implanted in a sclera of the eye, the body having a consistent thickness along its entire longitudinal length and along its entire lateral width, the mid-body portion being laterally narrower than some portions of each the distal end portion and the proximal end portion,
wherein the distal end portion includes: (i) a first lateral edge, (ii) a second lateral edge, and (iii) a distal edge that extends along an arc between the first and second lateral edges, and
wherein the first and second lateral edges are each non-parallel to the longitudinal axis such that a lateral width of the distal end portion increases along a distal to proximal direction.
2. The device of claim 1 , wherein a proximal edge of the proximal end portion is radiused.
3. The device of claim 1 wherein a maximum longitudinal length of the body in comparison to a maximum lateral width of the body is a ratio between 1:1 to 3:1.
4. The device of claim 1 , wherein the distal end portion is laterally flared.
5. The device of claim 1 , wherein the external surface of the device is configured to provide increased friction with the sclera.
6. The device of claim 1 , wherein the body includes one or more ribs extending longitudinally through at least a portion of the lumen, and wherein the one or more ribs define open channels for aqueous humor outflow.
7. The device of claim 1 , wherein the lumen is open from the proximal end portion to the distal end portion and configured to maintain a desired intraocular pressure without a porous element inside the lumen.
8. The device of claim 1 , wherein the lumenal surface of the device comprises a hydrophilic material.
9. The device of claim 8 , wherein the hydrophilic material comprises polyethylene glycol.
10. The device of claim 1 , wherein the external surface of the device is coated with a hetero-bifunctional crosslinker.
11. The device of claim 10 , wherein the hetero-bifunctional crosslinker is 5-azido-2-nitrobenzoic acid N-hydroxysuccinimide.
12. The device of claim 1 , wherein a maximum lateral width of the distal end portion is less than a maximum lateral width of the proximal end portion.
13. The device of claim 1 , wherein the lumen is circular.
14. The device of claim 1 , wherein the mid-body portion includes one or more pairs of lateral protrusions extending in opposite lateral directions from the body.
15. The device of claim 14 , wherein the one or more pairs of lateral protrusions extend in a same plane as a lateral flare of the distal end portion defined by the first and second lateral edges.
16. The device of claim 15 , wherein the proximal end portion includes a first flange portion and a second flange portion that each extend in the same plane as the lateral flare of the distal end portion and the one or more pairs of lateral protrusions of the mid-body portion.
17. A method for treating an eye condition, the method comprising:
providing the device of claim 1 ; and
implanting the device in the sclera of the eye such that aqueous humor flows from the anterior chamber to the tear film of the eye.
18. The method of claim 17 , wherein, after implanting the device, the proximal end portion protrudes from the eye by a distance in a range from about 50 μm to about 1000 μm.
19. The method of claim 18 , wherein a portion of the proximal end portion is laterally extended and a surface of the laterally extended portion is in contact with the eye and generally follows a contour of the eye.
20. The method of claim 17 , wherein the aqueous humor flowing from the anterior chamber to the tear film of the eye increases moisture and lubrication of a surface of the eye.