Ophthalmic knife and methods of use

1. A dual-blade ophthalmic knife, comprising:

a handle;

a shaft connected to the handle; and

a platform connected to the shaft, a front portion of the platform extending radially outward from the shaft, wherein the platform comprises:

a first blade;

a second blade;

an anterior blade tip;

an extension member extending from a back end of the platform opposing the front end of the platform and radially outward from the shaft, wherein the extension member is configured as a grasping feature; and

a movable sleeve configured to slideably move along the shaft and to grasp tissue between the sleeve and the grasping feature.

2. The ophthalmic knife of claim 1 , wherein the grasping feature is a tweezer.

3. The ophthalmic knife of claim 1 , wherein the grasping feature is a forceps.

4. The ophthalmic knife of claim 1 , wherein the grasping feature comprises a spring biased to close the grasping feature.

5. The ophthalmic knife of claim 1 , wherein the anterior blade tip is a retractable blade tip.

6. The ophthalmic knife of claim 1 , wherein the first blade and the second blade are respectively attached to a first lateral side and a second lateral side of the platform.

7. The ophthalmic knife of claim 1 , wherein the platform comprises a ramp increasing in depth extending from the anterior blade tip to a posterior end.

8. The ophthalmic knife of claim 1 , wherein the platform further comprises a first annular cutting edge.

9. The ophthalmic knife of claim 1 , wherein a width of the platform is between 0.2 to 0.3 mm.

10. The ophthalmic knife of claim 1 , wherein the shaft is a telescoping shaft.

11. The ophthalmic knife of claim 1 , wherein the sleeve is configured to overcome a biasing force of the grasping feature by engaging at least a portion of the grasping feature as the sleeve is moved in a direction along the shaft.

12. The ophthalmic knife of claim 1 , wherein the handle comprises an activation member coupled to the sleeve, the activation member configured to cause the sleeve to move.

13. The ophthalmic knife of claim 1 , wherein at least a portion of the grasping feature comprises a sharpened surface configured to cut tissue.

14. A method for incising a trabecular meshwork to form an opening in trabecular meshwork tissue of an eye having a Schlemm's Canal, an anterior chamber and a trabecular meshwork, the method comprising:

providing the knife of claim 1 ;

inserting the platform into the anterior chamber, the platform including the anterior tip;

advancing the platform, anterior tip first, through the trabecular meshwork and into the Schlemm's Canal;

advancing the platform, anterior tip first, through the Schlemm's Canal such that trabecular meshwork tissue contacts and is severed by the first and second blades; and

grasping the severed trabecular meshwork tissue with the grasping feature.

15. The method of claim 14 , wherein the grasping feature is a tweezer.

16. The method of claim 14 , wherein the grasping feature is a forceps.

17. The method of claim 14 , wherein the grasping feature comprises a spring biased to close the grasping feature.

18. The method of claim 14 , wherein the platform of the device further comprises a bottom surface that is transversely concave, wherein the platform is configured so that when the platform is advanced into the Schlemm's Canal, a back wall of the Schlemm's canal is juxtaposed to the bottom surface.

19. The method of claim 14 , wherein the handle of the device comprises an activation member, wherein applying a force to the activation member causes the grasping feature to close.

20. The method of claim 14 , wherein the handle of the device comprises an activation member, wherein applying a force to the activation member causes the grasping feature to open.