| 主权项 |
1. An ab inferno method for using a device to form an opening in the trabecular meshwork of a patient's eye, said method comprising the steps of:
obtaining a dual blade device which comprises a) an elongate proximal handpeice sized to be grasped by the hand of a human operator and b) an elongate probe extending from the handpeice, wherein the elongate probe comprises i) a shaft, ii) a distal protruding tip that extends at an angle of from 20 degrees to 90 degrees from a distal end of the shaft and is sized to be inserted in Schlemm's Canal and iii) first and second cutting edges located at the junction of the shaft and the distal protruding tip, said first and second cutting edges being formed on generally opposite edges of the distal end of the cutting tube said first and second cutting edges being separated by a distance D; an opening into the anterior chamber of the eye; inserting the elongate probe through the opening; advancing the elongate probe through the anterior chamber, while the anterior chamber is filled with fluid, to said operative position where the distal protruding tip is positioned within Schlemm's Canal and the first and second cutting surfaces are contacting the trabecular meshwork; and, thereafter causing the distal protruding tip to advance through a sector of Schlemm's Canal with first and second cutting edges concurrently cutting, from the trabecular meshwork, a strip of tissue having approximate width W, said approximate width W being approximately equal to the distance D between the first and second cutting edges. |
