Systems and methods for improving vision of a subject implanted with an intraocular lens (IOL). In some embodiments, a method of treating an ocular disease of a subject having an implanted intraocular lens (IOL) includes determining visual needs of a subject that are associated with an ocular disease of the subject determining a pattern of a plurality of pulses of radiation to apply, by refractive index writing, and applying the plurality of pulses of radiation to the one or more selected areas of the IOL.

Phacoemulsification apparatus includes a phacoemulsification handpiece having a needle and an electrical circuitry for ultrasonic vibrating the needle. A power source provides pulsed electrical power to the handpiece electrical circuitry and an input is provided for enabling a surgeon to select an amplitude of dislighted pulses and a pulse width. A control system and pulse duty cycle is provided for controlling the off duty cycle to insure heat dissipation before a subsequent pulse is activated, including a foot pedal switch.

In a liquid ejection control device, an ejection tube section type acquisition unit discriminates an ejection tube section type of an ejection tube section mounted in a main body section, and acquires a fitted correspondence relationship fitting the discriminated ejection tube section type. A voltage amplitude setting unit sets a voltage amplitude of a drive voltage waveform so as to cause kinetic energy to meet an energy instruction value input by using an energy dial based on a rising index value related to rising of the drive voltage waveform and a repetitive frequency instruction value input by using a repetitive frequency dial with reference to the fitted correspondence relationship.

In a liquid ejection control device, an ejection tube section type acquisition unit discriminates an ejection tube section type of an ejection tube section mounted in a main body section, and acquires a fitted correspondence relationship fitting the discriminated ejection tube section type. A voltage amplitude setting unit sets a voltage amplitude of a drive voltage waveform so as to cause momentum to meet a momentum instruction value input by using a momentum dial based on a rising index value related to rising of the drive voltage waveform and a repetitive frequency instruction value input by using a repetitive frequency dial with reference to the fitted correspondence relationship.

In certain embodiments, an ophthalmic surgical system for ablating tissue of an eye comprises controllable components (such as a light source and a scanner), optical elements, and a computer. The light source generates a light beam comprising pulses, where a propagation direction of the light beam defines a z-axis. The scanner directs a focal point of the light beam in an xy-plane orthogonal to the z-axis. The optical elements shape and focus the focal point of the light beam at a treatment region of the eye. The computer instructs one or more of the controllable components to generate the light beam comprising the pulses, where each pulse has a fluence greater than 1 J/cm.sup.2. An optical element of the optical elements focuses the focal point of the light beam with a spot size of less than 0.4 mm at the treatment region according to a focal spot pattern.

A surgical device drive system comprising a gear coupled to a drive train is disclosed. The gear is configured to transmit a proximal retraction motion to a drive member. The surgical device drive system further comprises a control system coupled to the gear, and a manual input device comprising an input component and a ratchet mechanism. The input component is selectively coupled to the gear by the ratchet mechanism. The drive train is operable in a distal advancement direction and in a proximal retraction direction. In a first state, the control system is configured to drive the gear and the drive train in the distal advancement direction and the proximal retraction direction. In a second state, the manual input device is configured to drive the gear and the drive train in the proximal retraction direction, but not the distal advancement direction, using the ratchet mechanism.

In certain embodiments, an ophthalmic surgical system for performing a surgical procedure on an eye comprises a laser device, a camera, and a computer. The laser device comprises a laser source and a scanner. The laser source generates a laser beam comprising pulses, and the scanner directs the pulses towards tissue of the eye according to a laser focal spot pattern. The camera captures surgical images of the eye. The computer instructs the laser device to direct the pulses towards the eye according to the laser focal spot pattern, accesses and monitor the surgical images of the eye, identifies an interfering object from the surgical images of the eye, and modifies the control of the pulses to compensate for the interfering object.

Systems and methods for controlling an energy output setting of a lithotripsy device during a lithotripsy procedure are provided. The system includes a laser or other lithotripsy device configured for facilitating the lithotripsy procedure, an irrigation system configured for supplying an irrigant such as saline to a surgical site, and a temperature sensor configured to provide temperature data associated with the irrigant. The system can modulate the energy output setting of the lithotripsy device based on an estimated temperature that is determined based at least in part on the temperature data and one or more other factors such as a current energy output setting or a flow rate of the irrigant.

Various systems and methods for controlling an ultrasonic surgical instrument according to the location of tissue grasped within an end effector are disclosed. A control circuit can be configured to apply varying power levels, via a generator, to an ultrasonic transducer driving an ultrasonic electromechanical system to oscillate an ultrasonic blade. Further, the control circuit can measure impedances of the ultrasonic transducer corresponding to the varying power levels and determine a location of tissue positioned within the end effector according to a difference between the impedances of the ultrasonic transducer relative to a threshold.

A medical instrument having a tool assembly including a pair of opposing tissue engaging surfaces for clamping tissue therebetween. The medical instrument includes a housing having a fixed handle and a movable handle mounted to the housing and selectively movable relative to the fixed handle from a first position in spaced relation relative to the fixed handle to a second position closer to the fixed handle to actuate the clamping of tissue. The medical instrument includes a selectively activatable drive assembly including a power source and a motor which is operatively coupled to the movable handle, wherein upon actuation the motor actuates the pair of opposing tissue engaging surfaces. The drive assembly includes a controller configured to variably control the rate at which the motor actuates the pair of opposing tissue engaging surfaces in response to the force exerted on the movable handle.