Abstract:
A method of reversibly separating an imaging assembly from an optical path in a laser surgical system includes generating an electromagnetic beam, propagating the electromagnetic beam from the beam source to a scanner along an optical path, the optical path comprising a first optical element that attenuates the electromagnetic beam, reversibly inserting a confocal bypass assembly into the optical path, diverting the electromagnetic beam along a diversion optical path around the first optical element, wherein the confocal bypass assembly automatically exits the optical path when a power loss occurs to one or more components of the system.
Abstract:
A system for ophthalmic surgery includes a laser source configured to deliver an ultraviolet laser beam comprising laser pulses having a wavelength between 320 nm and 370 nm to photodecompose one or more intraocular targets within the eye with chromophore absorbance. The pulse energy, the pulse duration, and the focal spot are such that an irradiance at the focal spot is sufficient to photodecompose the one or more intraocular targets without exceeding a threshold of formation of a plasma and an associated cavitation event. An optical system operatively coupled to the laser source and configured to focus the ultraviolet laser beam to a focal spot and direct the focal spot in a pattern into the one or more intraocular targets. The optical system focuses the laser beam at a numerical aperture that provides for the focal spot to be scanned over a scan range of 6 mm to 10 mm.
Abstract:
A method and device (100) for non-invasive monitoring of the temperature of the retina (101, 102) and the retinal pigment epithelium inside the eye (103), particularly during heating of the bottom of the eye, wherein alternating probing short-duration pulses of light (106a, 107a), one at wavelength close to the absorption maximum of the photoreceptor cell type and the other at wavelength in the near-infrared region, are directed at the retinal tissue at appropriate time intervals. Photoreceptor cell electrical signals, photoresponses, are recorded (109, 114) using electroretinography (ERG) and the changes in retinal temperature are determined (111, 112) from changes in photoresponse kinetics and changes in photoreceptor sensitivity to the stimuli. The method is especially applicable at temperatures up to 45 °C for humans and for other animals.
Abstract:
Embodiments of this invention generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for creating synchronized three-dimensional laser incisions. In an embodiment, an ophthalmic surgical laser system comprises a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye, an XY-scan device to deflect the pulsed laser beam, a Z-scan device to modify a depth of a focus of the pulsed laser beam, and a controller configured to synchronize an oscillation of the XY-scan device and an oscillation of the Z-device to form an angled three-dimensional laser tissue dissection.
Abstract:
A change in the response of the cornea to ultrasonic energy directed into the cornea is monitored during irradiation of the cornea to bring about corneal crosslinking. Because the change in ultrasonic response is correlated with the degree of crosslinking achieved, a desired degree of crosslinking can be achieved by terminating the irradiation when the change reaches a threshold. The change in ultrasonic response can be determined by taking a baseline measurement before irradiation and additional measurements during irradiation using the same ultrasonic transducer (47). The transducers may be carried on a device (30) resembling a contact lens which overlies the eye and which transmits the light used in the irradiation step to the eye.
Abstract:
본 발명은 드루젠 치료 방법 및 드루젠 치료 장치의 제어 방법에 관한 것으로, 본 발명은 환자의 안저(fundus)에 위치한 드루젠(drugen)의 위치를 확인하는 단계, 상기 드루젠이 존재하는 위치를 포함하여 치료 영역(treatment area)을 결정하는 단계 그리고 상기 치료 영역으로 에너지를 전달하여 상기 드루젠을 제거하는 단계를 포함하는 드루젠 치료 방법을 제공한다.
Abstract:
A method and a system for detecting a movement of a surface (3) on an irradiated sample, comprising a light source (1) for irradiating said surface (3) with a coherent light beam, a detector (4) for detecting variations caused by said movement in a speckle pattern produced by reflexions of said light beam at said surface (3), selecting a single speckle from said speckle pattern, and detecting said variations at the selected speckle.
Abstract:
In systems and methods for generating cross-linking activity in an eye, a feedback system monitors a biomechanical strength of the eye in response to the photoactivation of a cross-linking agent applied to an eye. The feedback system includes a perturbation system that applies a force to the eye and a characterization system that determines an effect of the force on the eye. The effect of the force provides an indicator of the biomechanical strength of the eye. The characterization system determines the effect of the force on the eye by measuring an amount of deformation caused by the force or a rate of recovery from the deformation.
Abstract:
A system and method for stabilizing an eye includes a contact element that is placed in contact with the anterior surface of the eye. The purpose here is to oppose movements of the eye during an ophthalmic surgical procedure. Importantly, while it is in contact with the eye, the contact element is positioned to exert minimal pressure on the eye. This is done to avoid causing any deformations of the eye that might otherwise adversely compromise a laser beam during the ophthalmic surgery.