Abstract:
Systems, methods, computer program products, and kits involving deformation mechanisms are provided for the removal of corneal tissue in optical vision treatments. According to exemplary embodiments, deformation mechanisms may be used in combination with the administration of femtosecond photoalteration lasers to create or define volumetric tissue portions for such removal.
Abstract:
Systems, methods, and computer program products are provided for the administration of annular and other ablation profiles during refractive surgery treatments. Basis data framework techniques enable the implementation of both circular and annular ablation profiles resulting in increased ablation efficiency when treating certain vision conditions. In some instances, systems or treatments involve the use of symmetric and asymmetric ablations shapes such as double spots, triple spots, quadruple spots, multiple spots, arc shapes, elliptical shapes, and the like.
Abstract:
Systems and methods are disclosed for registering a corneal flap for laser surgery on an eye. The method includes generating a first image of the eye (300) during a diagnostic procedure, determining a corneal flap geometry (305) referenced to the first image, generating a second image of the eye (310) during to a treatment procedure, comparing the first image with the second image (315), and registering the corneal flap geometry of the first image to the second image (320).
Abstract:
Systems, apparatus, and methods are disclosed for locating tissue layer transitions within a cornea, including focusing a laser to a laser spot with an energy below a photodisruption threshold of the cornea, varying a position of the focal spot of the laser between an anterior surface of the cornea and a posterior surface of the cornea, and determining one or more transitions of the tissue layers based on a change in harmonic light generated by the laser spot.
Abstract:
System, graphical user interface, and method for performing ophthalmic surgery on a cornea. The system includes a display (84) presenting a plurality of images representing corneal implants, a laser assembly (86) outputting a pulsed laser beam, and a control unit (82) coupled to the laser assembly and display. The control unit directs the laser assembly to produce a cavity in the cornea via the pulsed laser beam in response to a selected image, and the cavity receives a corneal implant corresponding to the selected image.
Abstract:
Systems and methods for fine-tuning refractive shapes for vision treatment are provided. Techniques encompass determining a variable index of refraction for a cornea of the eye, and determining the refractive treatment shape for the eye based on the variable index of refraction. Techniques also encompass determining a variable radius of curvature of an anterior surface of a cornea of the eye, and determining the refractive treatment shape for the eye based on the variable radius of curvature.
Abstract:
A patient interface device for an ophthalmic surgical laser system includes a lens cone component for coupling to the laser system and a suction ring component having a flexible skirt for coupling to the patient's eye. The suction ring component includes a gripper integrated with the flexible skirt, formed of hard plastic material and having two jaws that face each other to define a receiving opening between them. During use, a base portion of the lens cone is inserted into the receiving opening of the gripper and retained by the clamping force of the jaws. To ensure that the gripper securely retains the lens cone, a soft thermoplastic elastomer material is provided on the outer surface of the base portion of the lens cone, and the inner surfaces of the jaws of the gripper are provided with teeth to engage the soft thermoplastic elastomer material of the lens cone.
Abstract:
Various corneal marker tools and assemblies are provided for use in ophthalmic procedures to place ink marks on the cornea. One tool assembly (1) includes an applicator (10) containing an ink and a disposable marking tip (20) attachable to the applicator (10), where ink is injected from the applicator (10) into hollow channels of the marking tip (20). Another tool assembly includes a reusable handle and a disposable marking tip attachable to the handle. Another tool assembly includes a marker assembled with a cap with an ink pad. Another tool assembly includes a marker tool and a nesting adapter to be used with a patient interface device. Other tools have a one-piece design with a marker head and an handle fixedly joined together. Some tools have pre-inked marking elements, or an embedded light source, or a built-in level indicator, or a ring-shaped marker head, or a leaf spring feature on their marking prongs.
Abstract:
In laser-assisted corneal lenticule extraction procedures, the lenticule incision profile includes anterior and posterior lenticule incisions, with one or more of the following features: plano transition zone outside the optical zone, to improve mating of anterior and posterior incision surfaces after lenticule extraction; shallow arcuate incisions above the anterior incision and near the lenticule edge, to improve surface mating; separate ring cut intersecting the anterior and posterior incisions in the transition zone, to reduce tissue bridges and minimize tear at the lenticule edges and facilitate easy lenticule extraction; larger posterior incision, which includes a pocket zone outside the lenticule edge, for better surface mating and bubble management during cutting; and a separate ring shaped pocket cut intersecting the pocket zone of the posterior incision, for bubble management. An entry cut can intersect either the pocket zone of the posterior incision or an entry extension zone of the anterior incision.
Abstract:
A system (1000) includes: a first movable stage (1088) which is movable with respect to an eye (101) of a subject; a second movable stage (1089) mounted on the first movable stage (1088), wherein the second movable stage (1089) is movable with respect to the first movable stage (1088); a fixation target (1082) disposed on the second movable stage (1089); and an optical system (1083, 1084, 1085, 3080 ) disposed in an optical path between the fixation target (1082) and the eye (101), wherein the optical system (1083, 1084, 1085, 3080 ) is configured for projecting the fixation target (1082) upon the eye to accommodate the eye. The optical system includes a Stokes cell (3080) in the optical path between the fixation target (1082) and the eye (101). The optical system non-telecentrically projects the fixation target (1082) upon the eye (101).