In some embodiments, a microsurgical instrument includes a trocar having a rigid, hollow shaft formed with a lumen extending from a proximal end to a distal end of the shaft. The distal end of the shaft may be shaped for tissue penetration. The instrument may further include a composite microcannula slidably engaged with the trocar in the lumen. The microcannula includes a light guide and a flexible hollow tube having an outer diameter less than an inner diameter of the lumen in the trocar. Other embodiments include placing the microcannula in the lumen of the trocar, illuminating the end of the trocar by illuminating the end of the microcannula, advancing the trocar from a selected entry point on an eye into a selected structure in the eye, and extending the illuminated end of the microcannula from the trocar into the selected structure.

A fluid management system for an ophthalmic surgical system includes an irrigation system and an aspiration system. The irrigation system carries fluid toward a handpiece and includes an irrigation pump or a plurality of pumps. The aspiration system carries fluid away from the handpiece and includes an aspiration pump or the plurality of pumps. The pumps include at least one magnetic pump configured to move the fluid. The magnetic pump includes a plug system and a magnetic field system. The plug system includes one or more plugs disposed within a housing, where each plug comprises a magnetic material. The magnetic field system generates a magnetic field to move one or more of the plugs in order to move the fluid in a pumping direction.

A method of corneal implantation with cross-linking is disclosed herein. In one or more embodiments, the method includes the steps of: (i) prior to implantation, treating an implant formed from donor corneal tissue or a tissue culture grown corneal stroma with a solution of sodium dodecyl sulfate (SDS), Triton X-100, benzalkonium chloride (BAK), Igepal, genipin, 100% glycerol, or alcohol for making the implant acellular, and for killing any bacteria, viruses, or parasites prior to implantation; (ii) implanting the implant into a recipient cornea; (iii) applying laser energy to the implant so as to modify the refractive power of the implant while being monitored using a Shack-Hartmann wavefront system so as to achieve a desired refractive power for the implant; and (iv) applying a cross-linking solution and irradiating the implant to cross-link the implant to prevent an immune response to the implant and/or rejection of the implant by a patient.

A system includes a pump, an inlet sensor, an outlet sensor, and a controller. The pump is configured for pumping fluid in a phacoemulsification system. The inlet sensor is coupled with an inlet port of the pump and is configured to sense an inlet temperature of the fluid at the inlet port. The outlet sensor is coupled with an outlet port of the pump and is configured to sense an outlet temperature of the fluid at the outlet port. The controller is configured to take a responsive action based a difference between the inlet temperature and the outlet temperature crossing a defined threshold.

Embodiments disclosed herein provide devices, systems, and methods for instrument exchanges during ophthalmic surgery. More particularly, the present disclosure relates to valved cannula assemblies and methods of use thereof. A valved cannula assembly includes a cannula having a head at a proximal end of the cannula and a hollow rod extending from the head to a distal end of the cannula. The valved cannula assembly includes a valved hub coupled to the head and including a septum having two or more curved flaps configured to provide an opening for an instrument.

A gas mixing system for providing mixed gas for intraocular injection. In some embodiments, a first fixed-volume chamber is automatically purged and filled with gas from a first gas supply input, to a first predetermined pressure. A second fixed-volume chamber is purged and filled with gas from a second gas supply input, to a second predetermined pressure. The first and second predetermined pressures are determined based on a desired concentration of gases in the final mix, and the respective volumes of the first and second fixed-volume chambers and of a third fixed-volume chamber. Gas from the first fixed-volume chamber is then allowed to mix with gas in the third fixed-volume chamber, which was previously purged. Next, gas from the second fixed-volume chamber is allowed to mix with gas in the third fixed-volume chamber. Finally, the mixture of gases in the third fixed-volume chamber is expressed into an intraocular syringe.

Intraocular physiological sensor implants include a physiological sensor, and a housing comprising a faceplate. The physiological sensor is integrated with the faceplate. The physiological sensor typically comprises an intraocular pressure sensor, such as a capacitive pressure sensor that may further include a flexible diaphragm electrode spaced apart from a counter electrode. The intraocular pressure sensor detects intraocular pressure, to identify patient conditions such as glaucoma.

The invention relates to a foot pedal control unit for an ophthalmic surgery system. The unit has a base and a treadle that is configured for pivotal pitch movement and for pivotal yaw movement relative to the base for generating control signals to an ophthalmic surgery system. The unit further comprises an inlay cover that is removably placed on the treadle. Optionally, the unit comprises a locking element that is movable between a lock position wherein the treadle is locked against pivotal yaw movement and a release position wherein the treadle is enabled to perform pivotal yaw movement.

Aspects of embodiments pertain to an intraoperative ophthalmic tissue monitoring system, comprising at least one sensor configured to sense a physical quantity relating to an ophthalmic tissue characteristic of an eye. The system is further configured to provide, responsive to sensing the physical quantity, a sensor output relating to the sensed physical quantity. The system additionally comprises a processor, and a memory comprising for storing software executable by the processor for enabling the following: controlling, based on the sensor output, a characteristic of ultrasound energy for performing phacoemulsification of a lens of the eye.

Certain embodiments provide a cannula system with a retention mechanism comprising a cannula, a hub coupled to the cannula, wherein a distal end of the cannula is configured to be inserted into a body part up to the hub, and a retention mechanism configured to create resistance for retaining the cannula inside the body part in response to force exerted on the cannula for pulling the cannula out of the body part. The retention mechanism may include retention elements coupled to a bottom surface of the hub, and by rotating the hub in a first direction, the one or more retention elements that are parallel to a surface of the body part are configured to penetrate the body part. In other embodiments, the retention mechanism may include halfpipe elements that pivot on fulcrum points to hold or release the hub and cannula from the body part.