摘要:
A system for forming a corneal implant includes a cutting apparatus, which includes a laser source that emits a laser and optical elements that direct the laser. The system includes a controller implemented with at least one processor and at least one data storage device. The controller generates a sculpting plan for modifying a first shape of a lenticule formed from corneal tissue and achieving a second shape for the lenticule to produce a corneal implant with a refractive profile to reshape a recipient eye. The sculpting plan is determined from measurements relating to the lenticule having the first shape and information relating to a refractive profile for a corneal implant. The controller controls the cutting apparatus to direct, via the one or more optical elements, the laser from the laser source to sculpt the lenticule according to the sculpting plan to produce the corneal implant with the refractive profile.
摘要:
The invention addresses in particular the problem resistant pathogens and cancer cells. A method is provided of applying a composition to a human or non-human individual or to an object or a surface area and a pharmaceutical composition with a regimen of administering it to a human or non-human individual is provided. The composition comprises an active chemical component for killing of or retarding proliferation of target cells including pathogens, infected cells and cancer cells. The application of the composition and the regimen of administration of the composition are accompanied by at least one exposure to electromagnetic radiation in a range of wavelength, in which the active chemical component absorbs and which has a lower limit of 190 nm thereby photo-activating the active component.
摘要:
An apparatus and method for performing ophthalmic laser surgery is provided. The apparatus includes a laser engine configured to deliver a laser pulse to a patient's eye, including a three-port isolator and a collimator attached to the three-port isolator. The collimator includes a collimating lens positioned adjacent to the three-port isolator and a fiber configured to receive laser light energy and provide laser light energy to the collimating lens and three-port isolator in a desired orientation.
摘要:
Bisher wird zur Stabilisierung der Augenhornhaut bei Keratokonus ein vernetzendes Agens appliziert und die gesamte Hornhaut über eine relativ lange Zeit hinweg mit UV-Licht bestrahlt, was für den Patienten unangenehm ist und zu Gewebeschädigungen führen kann. Die Erfindung soll es ermöglichen, die Hornhaut mit geringeren Nebenwirkungen zu stabilisieren. Insbesondere soll eine größere Stabilität und eine kürzere Behandlungsdauer ermöglicht werden. Zu diesem Zweck wird die Hornhaut sukzessiv an verschiedenen Stellen lokal derart bestrahlt, dass an den bestrahlten Stellen Kollagenfasern mittelbar oder unmittelbar miteinander vernetzt werden. Die Kollagenfasern werden dadurch vorteilhafterweise ortsaufgelöst vernetzt. Auf diese Weise braucht nicht mehr das gesamte Auge mit gewebeschädigendem UV-Licht bestrahlt zu werden und es können Bereiche mit schwacher Struktur örtlich selektiv stabilisiert werden. Vorzugsweise werden die Stellen der Hornhaut derart bestrahlt, dass die Kollagenfasern jeweils durch Photoabsorption mehrerer Photonen, die jeweils eine Energie unterhalb einer lonisierungsenergie eines betreffenden Moleküls aufweisen, ionisiert werden. Nach kurzer Behandlungszeit entstehen starke kovalente Bindungen unmittelbar zwischen den Kollagenfasern. Auf die Verwendung von vernetzenden Agentien kann vollständig verzichtet werden.
摘要:
A lens for placement in a human eye, such as an intraocular lens, has at least some of its optical properties modified with a laser. The lens preferably contains at least 5% by weight UV absorber so commercially feasible rates of manufacture can be achieved. The laser forms modified loci in the lens where the modified loci have a different refractive index than the refractive index of the material before modification. The same laser modification technique can be used on the cornea in situ.
摘要:
A wavefront sensor is integrated with a surgical microscope for allowing a doctor to make repeated wavefront measurements of a patient's eye while the patient remains on an operating table in the surgical position. The device includes a wavefront sensor optically aligned with a surgical microscope such that their fields of view at least partially overlap. The inclusion of lightweight, compact diffractive optical components in the wavefront sensor allows the integrated device to be supported on a balancing mechanism above a patient's head during a surgical procedure. As a result, the need to reposition the device and/or the patient between measuring optical properties of the eye and performing surgical procedures on the eye is eliminated. Many surgical procedures may be improved or enhanced using the integrated device, including but not limited to cataract surgery, Conductive Keratoplasty, Lasik surgery, and corneal corrective surgery.
摘要:
An apparatus for corneal crosslinking, the use of the apparatus for corneal crosslinking, and a method for corneal crosslinking are provided. The apparatus comprises a source of laser radiation; a scanner device for scanning the laser radiation; and a control computer for controlling the scanner device.
摘要:
A system and method for reshaping and altering the cornea of an eye employs a laser beam for two different purposes. For one, the laser beam is configured to perform Laser Induced Optical Breakdown (LIOB ) on selected tissue in the stroma of the cornea. This generally weakens the stromal tissue and allows intraocular pressure and bio-mechanical forces in the eye to reshape the cornea. For the other, the laser beam is configured to cause Permanent Structural Change (PSC) on selected tissue in the stroma of the cornea. This alters the tissue density of the selected PSC stromal tissue to change its refractive index. In combination, the LIOB and PSC provide for corrected vision.
摘要:
A wavefront sensor is integrated with a surgical microscope for allowing a doctor to make repeated wavefront measurements of a patient's eye while the patient remains on an operating table in the surgical position. The device includes a wavefront sensor optically aligned with a surgical microscope such that their fields of view at least partially overlap. The inclusion of lightweight, compact diffractive optical components in the wavefront sensor allows the integrated device to be supported on a balancing mechanism above a patient's head during a surgical procedure. As a result, the need to reposition the device and/or the patient between measuring optical properties of the eye and performing surgical procedures on the eye is eliminated. Many surgical procedures may be improved or enhanced using the integrated device, including but not limited to cataract surgery, Conductive Keratoplasty, Lasik surgery, and corneal corrective surgery.
摘要:
Apparatus for effecting harmonic conversion of a laser beam of predetermined frequency to provide plural harmonic components of the laser beam at frequencies different from the predetermined frequency, includes a housing (40) defining a hermetically sealed chamber able to be maintained at a pressure below atmospheric pressure. Also provided are port means for evacuating the chamber, and means (36, 37) defining an optical path for the laser beam and the components thereof through the housing and the chamber. A plurality of individual holders (20, 22, 24) are arranged for retaining respective frequency conversion crystals at spaced locations in the optical path. The crystals (20, 22, 24) can be individually aligned and heated within the chamber.