IP Library › Granted Patent US 12,589,024
Granted Patent B2
US 12,589,024 · App. 19/236,848 · Granted Mar 31, 2026

Ocular delivery systems and methods

Inventors: David Y. Badawi (Glenview, IL); Daniel O'Keeffe (San Francisco, CA); Paul Badawi (Atherton, CA)
Assignee: SIGHT SCIENCES, INC.
A61F9/0008A61F9/0017A61F9/007A61F9/00736A61F9/00781
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Quick Facts
Patent No.
US 12,589,024
App. No.
19/236,848
Granted
Mar 31, 2026
Kind
B2
Abstract

Described here are systems and methods for accessing Schlemm's canal and for delivering an ocular device or fluid composition therein. The ocular devices may maintain the patency of Schlemm's canal without substantially interfering with transmural fluid flow across the canal. The fluid composition may be a viscoelastic fluid that is delivered into the canal to facilitate drainage of aqueous humor by disrupting the canal and surrounding trabeculocanalicular tissues. Tools for disrupting these tissues and minimally invasive methods for treating medical conditions associated with elevated intraocular pressure, including glaucoma, are also described.

Claims (42)

1 . A method for reducing intraocular pressure of an eye comprising:

advancing a device at least partially through an anterior chamber of the eye and into Schlemm's canal, wherein the device comprises a conduit for delivering viscoelastic fluid to Schlemm's canal;

advancing the conduit along an arc of Schlemm's canal;

delivering about 8 μl to about 50 μl of viscoelastic fluid to Schlemm's canal to dilate associated collector channels; and

delivering an ocular device to Schlemm's canal, wherein the ocular device comprises a suture.

2 . The method of claim 1 , wherein the ocular device maintains patency of the canal.

3 . The method of claim 1 , wherein the suture is a modified suture.

4 . The method of claim 1 , wherein the ocular device improves outflow of aqueous humor.

5 . The method of claim 1 , wherein the ocular device disrupts trabecular meshwork of the eye or an inner wall of Schlemm's canal.

6 . The method of claim 5 , wherein the ocular device stretches the trabecular meshwork.

7 . The method of claim 1 , wherein the viscoelastic fluid is delivered while moving the conduit.

8 . The method of claim 1 , wherein the viscoelastic fluid is delivered while retracting the conduit along the arc of Schlemm's canal.

9 . The method of claim 1 , wherein about 20 μl of viscoelastic fluid is delivered.

10 . The method of claim 1 , wherein the viscoelastic fluid is delivered about at least a 90 degree arc of Schlemm's canal.

11 . The method of claim 1 , wherein delivering the viscoelastic fluid comprises pressurizing a fluid reservoir.

12 . The method of claim 1 , wherein the device further comprises a handle and a cannula coupled to the handle, and wherein the conduit is slidably positioned within the cannula.

13 . The method of claim 12 , wherein the handle further comprises an actuator configured to deliver the viscoelastic fluid.

14 . The method of claim 13 , wherein the handle is capable of being held in a single hand of a user.

15 . A method for reducing intraocular pressure comprising:

advancing a device at least partially through an anterior chamber of an eye and into Schlemm's canal, wherein the device comprises a conduit for delivering viscoelastic fluid to Schlemm's canal;

advancing the conduit along an arc of Schlemm's canal;

delivering about 20 μl of viscoelastic fluid to Schlemm's canal; and

after delivering the about 20 μl of viscoelastic fluid, delivering an ocular device comprising a suture to Schlemm's canal.

16 . The method of claim 15 , wherein the ocular device maintains patency of the canal.

17 . The method of claim 15 , wherein the ocular device improves outflow of aqueous humor.

18 . The method of claim 15 , wherein the ocular device disrupts trabecular meshwork of the eye or an inner wall of Schlemm's canal.

19 . The method of claim 18 , wherein the ocular device stretches the trabecular meshwork.

20 . The method of claim 15 , wherein the viscoelastic fluid is delivered while moving the conduit.

21 . The method of claim 15 , wherein delivering the viscoelastic fluid comprises pressurizing a fluid reservoir in fluid communication with the conduit.

22 . The method of claim 15 , wherein the viscoelastic fluid delivered to Schlemm's canal dilates associated collector channels.

23 . The method of claim 15 , wherein the device further comprises a handle and a cannula coupled to the handle, wherein the conduit is slidably positioned within the cannula and wherein the handle comprises an actuator configured to deliver the viscoelastic fluid.

24 . The method of claim 15 , wherein the viscoelastic fluid is delivered about at least a 180 degree arc of Schlemm's canal.

25 . A method for reducing intraocular pressure comprising:

advancing a device at least partially through an anterior chamber of an eye and into Schlemm's canal, wherein the device comprises a conduit for delivering viscoelastic fluid to Schlemm's canal;

advancing the conduit along an arc of Schlemm's canal;

delivering about 8 μl of viscoelastic fluid to Schlemm's canal while retracting the conduit; and

delivering an ocular device to Schlemm's canal to maintain patency of the canal, wherein the ocular device comprises a suture.

26 . The method of claim 25 , wherein the suture is a modified suture.

27 . The method of claim 25 , wherein the ocular device improves outflow of aqueous humor.

28 . The method of claim 25 , wherein the viscoelastic fluid is delivered about at least a 180 degree arc of Schlemm's canal.

29 . The method of claim 25 , wherein the viscoelastic fluid delivered to Schlemm's canal dilates associated collector channels.

30 . The method of claim 25 , wherein the device further comprises a handle and a cannula coupled to the handle, wherein the conduit is slidably positioned within the cannula and wherein the handle comprises an actuator configured to deliver the viscoelastic fluid.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 20, 2025
From: BADAWI, DAVID Y.; O'KEEFFE, DANIEL; BADAWI, PAUL
To: SIGHT SCIENCES, INC.
Reel/Frame 071465/0873 →
SECURITY INTEREST Recorded Jun 20, 2025
From: SIGHT SCIENCES, INC.
To: ASSIGNEE: HERCULES CAPITAL, INC., AS AGENT
Reel/Frame 071676/0121 →
Continuity (12)
Continuation 18898460 · Sep 26, 2024
Continuation 18130353 · Apr 3, 2023
Continuation 17827494 · May 27, 2022
Continuation 17553671 · Dec 16, 2021
Continuation 17472147 · Sep 10, 2021
Continuation 17239263 · Apr 23, 2021
Continuation 17098231 · Nov 13, 2020
Continuation 16189882 · Nov 13, 2018
Continuation 14816822 · Aug 3, 2015
Continuation 13644748 · Oct 4, 2012
Provisional Application 61613274 · Mar 20, 2012
Related Publication 20250302666A1 · Oct 2, 2025
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