| 摘要 |
A phacoemulsification needle tip of the present invention has a continuous cutting edge formed at an inner surface of a cylindrical needle shaft. The cutting edge is formed by cutting the needle shaft at an angle and beveling the exterior surface of at least the forward portion of the needle. The beveling of the exterior surface of the needle tip moves the cutting edge from an exterior diameter of the needle to an interior diameter of the needle. The needle tip having the shape of the present invention has improved cutting ability, accuracy, and threading ability which are important for phacoemulsification procedures. The needle tip is also less likely to puncture sensitive membranes of the eye during surgery. The needle tip may also include an internal beveled surface at a trailing portion of the cutting edge.
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