An exemplary surgical device includes a shaft with a lumen defined therethrough and an element movable from a stored position to a deployed position in which a larger portion of the element extends out of the distal end of the lumen; wherein motion from the stored position to the deployed position causes a first leg of the element to advance distally relative to the distal end of the shaft, and causes a second leg of the element to move proximally relative to the distal end of the shaft.

An exemplary surgical device includes a shaft with a lumen defined therethrough and an element movable from a stored position to a deployed position in which a larger portion of the element extends out of the distal end of the lumen; wherein motion from the stored position to the deployed position causes a first leg of the element to advance distally relative to the distal end of the shaft, and causes a second leg of the element to move proximally relative to the distal end of the shaft.

Devices, systems, and methods for performing an ophthalmic procedure in an eye are disclosed. The devices include a hand-held portion and a distal, elongate member coupled to the hand-held portion having a lumen operatively coupled to a vacuum source. A drive mechanism operatively coupled to the elongate member is configured to oscillate the elongate member. When in use, the device is configured to aspirate ocular material from the eye through the lumen. The drive mechanism retracts the elongate member with a retraction speed profile and advances the elongate member with an extension speed profile. The retraction speed profile is different from the extension speed profile.

A pneumatic valve directs pressurized air to and air exhaust from a surgical implement, such as a dual actuation vitreous probe. The pneumatic valve includes an axially symmetric valve body configured to rotate from a first position, in which the pneumatic valve places a first port of the surgical implement in fluid communication with the pressurized air and a second port of the surgical implement in fluid communication with the air exhaust, to a second position, in which the pneumatic valve places the first port in fluid communication with the air exhaust and the second port in fluid communication with the pressurized air, and back to the first position, in one rotational direction. As such, the axially symmetric valve body continuously rotates in one rotational direction to alternate the pressurized air and the air exhaust between the two ports of the surgical implement to drive the dual actuation operation.

Provided herein are vitrectomy instruments and related systems and methods in which example vitrectomy instruments have multiple rotating cutting edges for severing vitreous fibers. An example vitrectomy instrument may include a handle; an outer tube; and an inner tube configured to be rotated within the outer tube in multiple oscillating rotational cycles. The outer tube may include a port disposed at a distal end thereof. The inner tube may include at least first and second forward cutting edges, so that rotation in a first rotational direction results in both the first and second forward cutting edges cutting vitreous fibers drawn into the port. The inner tube may also include one or more backward cutting edges, so that rotation in a second rotational direction results in one or more backward cutting edges cutting vitreous fibers drawn into the port. Additional forward and/or backward cutting edges may be provided.

Active noise cancellation is employed to address unwanted acoustical noise generated by various equipment associated with an ophthalmic surgical system. Active noise cancellation may be used within a chassis of the ophthalmic surgical system, within an air compressor used with the ophthalmic surgical system, and within a reciprocating surgical probe used with the ophthalmic surgical system.

Devices and methods for cutting a lens in the eye are provided with a specific application being for cutting a lens while contained within the capsular bag. The device has an elongate element which forms a loop. The loop is advanced into a space between the lens and the capsular bag. The device may be used with, or incorporated into, fluid handling devices such as irrigation and aspiration devices and phacoemulsification hand pieces and disposables.

A vitrectomy apparatus is provided, including a pressure source, a cut valve connected to the pressure source, the cut valve configured to be turned on and off to provide pressure to selectively extend and retract a vitrectomy cutting device, a sensor configured to sense pressure provided from the cut valve, and a controller configured to control operation of the cut valve based on pressure sensed by the sensor. The controller is configured to monitor pressures encountered and alter cut valve timing based on pressure conditions previously encountered.

An exemplary surgical device includes a shaft with a lumen defined therethrough and an element movable from a stored position to a deployed position in which a larger portion of the element extends out of the distal end of the lumen; wherein motion from the stored position to the deployed position causes a first leg of the element to advance distally relative to the distal end of the shaft, and causes a second leg of the element to move proximally relative to the distal end of the shaft.

The present invention relates to a phacoemulsification handpiece, comprising a needle and a microelectromechanical system (MEMS) device, wherein the needle is coupled with the MEMS device. The phacoemulsification handpiece may further comprise a horn, wherein the horn is coupled with the needle and the MEMS device. The MEMS device is capable of generating movement of the needle in at least one direction, wherein at least one direction is selected from the group consisting of transversal, torsional, and longitudinal. The present invention also relates to a method of generating movement, comprising providing a phacoemulsification handpiece, wherein the handpiece comprises a needle and one or more MEMS devices; applying a voltage or current to the one or more MEMS devices, wherein the MEMS devices are coupled with the needle; and moving the needle in at least one direction. The present invention also relates to a vitrectomy cutter comprising one or more MEMS devices.