400 results about "Ophthalmic surgery" patented technology

A disposable stabilization and applanation device for reconfiguring the cornea of an eye for ophthalmic laser surgery, includes an applanation lens that is disposed in a particular spatial position with respect to an incident laser beam. The applanation lens is inserted into the central opening of an attachment ring and applanates the eye in response to pressure from a lens cone. The attachment ring is coupled to the eye and includes a skirt which surrounds the applanation lens and extends outwardly therefrom to define a chamber. The skirt is formed with a groove which defines a suction channel between the attachment ring skirt and the corneal surface of an eye. A vacuum source is connected and fluid communication with the suction channel and is selectively activated to create a partial vacuum in the channel.

Devices, systems, and methods for treatment of an eye alter aspiration flow from the eye in response to an occlusion of the aspiration conduit pathway. Where aspiration is drawn from the eye using a volumetric pump, the pump can be reversed so as to induce fluid reflux from the aspiration conduit pathway into the eye to help clear the occlusion. The pump may vary the reverse flow in response to sensed aspiration pressure or the like, and the reverse flow may be halted before the pressure within the aspiration conduit pathway adjacent the eye significantly exceeds the irrigation fluid pressure and/or the pressure within the eye. Reflux may alternatively be generated by modulating a vent valve disposed between an irrigation conduit pathway and the aspiration conduit pathway.

A refractive laser surgery process is disclosed for using compact, low-cost ophthalmic laser systems which have computer-controlled scanning with a non-contact delivery device for both photo-ablation and photo-coagulation in corneal reshaping. The basic laser systems may include flash-lamp and diode pumped UV solid state lasers (193-215 nm), compact excimer laser (193 nm), free-running Er:glass (1.54 microns), Ho:YAG (2.1 microns), Q-switched Er:YAG (2.94 microns), and tunable IR lasers, (750-1100) nm and (2.5-3.2) microns. The advantages of the non-contact, scanning device used in the process over other prior art lasers include being safer, reduced cost, more compact and more precise and with greater flexibility. The theory of beam overlap and of ablation rate and coagulation patterns is also disclosed for system parameters. Lasers are selected with energy of (0.01-10) mJ, repetition rate of (1-10,000), pulse duration of 0.01 nanoseconds to a few hundreds of microseconds, and with spot size of (0.05-2) mm for use with refractive laser surgery.

The invention is generally directed to systems and methods for ophthalmic surgery, and more particularly to systems and methods for phacoemulsification using vacuum-based aspiration pumps. In accordance with one embodiment, a vacuum-based phacoemulsification system, having a handpiece, includes a subsystem to detect an occlusion occurring at the handpiece during operation.

An improved applanation lens and method for use in an interface between a patient's eye and a surgical laser system does not discolor or lose light transmittance when subjected to gamma radiation. The improved applanation lens has an applanation surface configured to contact the eye upon application of a pressure. The lens is formed of high purity silicon dioxide (SiO₂) with purity great enough to resist discoloration upon prolonged irradiation by high-energy radiation such as UV, x-rays, gamma rays or neutrons, and is preferably a fused silica.

A foot pedal control for a surgical system (e.g., an ophthalmic surgery system) that adjusts to a number of different sizes of user's shoes. The foot pedal control has a treadle on which a user places his or her foot and a sensor that tracks the movements thereof. Adjustable lateral guides mount to the treadle and conform to both sides of the foot. The guides are shaped and positioned to conform to a wide variety of feet or shoes, and may easily be adjusted between users. A retractable heel stop converts between up for reference and down to enhance movement of the user's foot. A convertible handle may be stowed in a down position parallel to a base or pivoted up over the treadle for protection and ease of movement of the foot pedal control. The foot pedal control may be wireless and have various other electronic controls, and may have a dual-control treadle.

A design for dynamically adjusting parameters applied to a surgical instrument, such as an ocular surgical instrument, is presented. The method includes detecting surgical events from image data collected by a surgical microscope focused on an ocular surgical procedure, establishing a desired response for each detected surgical event, delivering the desired response to the ocular surgical instrument as a set of software instructions, and altering the surgical procedure based on the desired response received as the set of software instructions.

The present invention is directed to a surgical cutting device having a body, a piezoelectric actuator received within and secured to the body and a blade associated with and in communication with the actuator. The actuator is adapted for vibrating at a frequency to produce an oscillating displacement of the blade. A method of operating the surgical cutting device is also provided wherein the cutting device includes an actuator which is adapted for vibrating at a frequency to produce a sinusoidal displacement of the blade in the range of 250-500 μm.

The present invention provides a method for minimizing fluence distribution of a laser over a predetermined pattern. In particular, the method is useful for minimizing fluence variance over a predetermined pattern for lasers used in ophthalmic surgery.

A cassette 74 for use with an ophthalmic surgical pump 16 for collecting aspirant fluid and tissue from a patient's eye includes a rigid walled container 18 having an interior volume 42. At least one tapered alignment slot 20 is formed in a side wall of the container 18 and extends from a back wall 24 towards a front wall 26. An irrigation and aspiration manifold base 50 is removeably attached to the container 18. An aspiration path 46 is formed within the container 18 for receiving the aspiration fluid and the tissue from the eye and directing the flow of fluid towards a front half of the container 18 before the fluid and tissue collects within a majority of the interior volume 42 of the container 18. A fluid level indicator 34 is formed on a wall 22 of the container 18, such that an associated photo-detector 86 of the pump 16 may determine a level of fluid in the container 18.

The present invention relates to methods and apparatus to improve human ophthalmic surgery patient wellness and surgical procedural outcome of both indicated cataract surgery and elective surgeries with the implantation of permanent standard intraocular lens (IOL) and new technology intraocular lens (NTIOL). The present invention further relates to measurement of refraction intra-operatively to validate or obviate the pre-operative calculations and thus selection of the IOL or NTIOL and allow for a correction to be made intra-operatively before the permanent IOL or NTIOL is implanted. Specifically, several embodiments of the invention pertain to a disposable, temporary Proxy Lens apparatus that are used for in situ refractive measurements, an Insertion Tool apparatus to manipulate the Proxy Lens within the optical path for the refractive measurement and a Refractometer apparatus to perform the refractive measurements.

An ophthalmic surgery illuminated directional laser probe has a handle and a rigid tubular tip projecting from the handle, and has an illumination optic fiber and a laser optic fiber that extend through the handle and the tip. A mechanism on the handle is operable to extend distal ends of the illumination optic fiber and the laser optic fiber from the distal end of the instrument tip, and to retract the distal ends of the illumination optic fiber and the laser optic fiber back into the interior of the tip. At least one of the distal ends of the illumination optic fiber and the laser optic fiber is held in a curved configuration. The distal ends of the illumination optic fiber and the laser optic fiber are secured to each other, whereby both the illumination optic fiber and the laser optic fiber curve into a bent configuration as the distal ends of the illumination optic fiber and the laser optic fiber are extended from the distal end of the instrument tip.

Apparatus for ophthalmic surgery, especially non-penetrating filtration surgery, comprising a laser source that ablates sclera tissue at steps of intermediate thickness. Optionally, the beam is scanned using a scanner and its results viewed using an ophthalmic microscope.

A method for making, storing and using a surgical graft from equine amniotic membrane in veterinary ophthalmology. The amniotic membrane is obtained from equine placenta, from which the chorion has been separated. Sheets of the amniotic membrane are cut to size and mounted on filter paper. The cells of the amniotic membrane are killed, preferably while being frozen and thawed in the storage solution. The equine amniotic membrane can be used in a variety of ocular surgeries in horses but also other species such as food animals, dogs and cats. It represents a strong biomaterial that will give a good physical support to the ocular tissues while inducing a minimal amount of scarring which is primordial in ocular surgeries in order to obtain the best visual outcome.

A surgical instrument system for ophthalmic surgery in an eye is provided, comprising: an OCT apparatus including an interferometer; an optical fiber coupled to the OCT apparatus and extending a probe arm of the interferometer; a hand tool comprising: a hand piece, a tube extending away from the hand piece and comprising a distal end portion having a longitudinal axis, wherein a distal portion of the optical fiber is received within the tube; a beam emitter coupled to a tip end of the optical fiber and configured to emit an OCT measuring beam into an emission direction; and an actuator configured to change the emission direction of the OCT measuring beam relative to a tip end of the distal end portion.

The invention provides an ophthalmic, otic or nasal pharmaceutical composition, comprising levofloxacin or the pharmaceutical acceptable salts thereof and loteprednol etabonate, wherein the weight ratio of loteprednol etabonate to levofloxacin is 1:0.2-5. The use of ophthalmic, otic or nasal pharmaceutical composition of the invention in preparation of the medication for treatment of conjunctivitis, keratitis, blepharitis, dacrycystitis, hordeolum, corneal ulcer and ocular infection accompanied with ophthalmitis and even inflammation of the surrounding tissues, to prevent increase of bacterial infection risks and the tissue inflammation of the infected area after the ophthalmic surgeries or ocular injuries, to treat or alleviate the bacterial infection in combination with the tissue inflammation of the infected area, or to treat tympanitis, otitis externa and infective rhinitis.

A laser delivery system for ophthalmic surgery includes a laser engine, configured to generate a laser beam, an optical block, to receive the laser beam generated by the laser engine and to precompensate an aberration of the laser beam, and an XY scanner, to receive, directly or indirectly, the precompensated laser beam outputted by the optical block and to scan the laser beam in a direction essentially transverse to an optical axis of the laser delivery system.

Surgical instruments and their methods of use enable a surgeon to form a precut lamellar disk that is removed by the same through a single incision along the perimeter of the cornea. This may be done using one this one instrument. Another instrument enables the surgeon to scrap off adhering parts. One more instrument enables the surgeon to hold a folded cornea donor disk to avoid inverting the disk upon unfolding. Yet another instrument enables the surgeon to “iron out” wrinkles in the implanted donor cornea.

A ring for dilating a pupil during an ophthalmic procedure includes a series of spaced supports for engaging an iris perimeter. The supports are plate elements which form an open pocket directed outwardly for engaging the iris. The sides of the ring form a primary plane, and the plates are located in respective planes above and below the primary plane. The outer periphery of the top and bottom plates forms a lip feature which is the opening to the pocket which retains the iris.

An enhanced flow ophthalmic surgical probe for ophthalmic microsurgery, such as vitrectomy, in an eye of a patient is disclosed. The enhanced flow probe includes a body, a needle, a cutter, and an optional stiffening sleeve. The needle, the cutter, and the optional stiffening sleeve each possess a widened diameter at its proximal portion relative to the diameter at its distal portion, thereby providing an enhanced ophthalmic surgical probe that allows adequate stiffness, reduced flow resistance, and an increased flow rate while maintaining a less invasive, large gauge diameter needle and cutter.