16 results about "Eye surgery laser" patented technology

In an ophthalmic surgical laser system, a patient interface device for coupling a patient's eye to the laser system includes a lens cone with a frustoconical shaped shell for coupling to the laser system and a suction ring for coupling to the patient's eye, the lens cone and the suction ring being joined together by clamping. A cap is provided for use with the lens cone as an installation aid. In the configuration supplied to the user, the lens cone is partially embedded in and snapped to the cap. The cap has a portion with a relatively large diameter and multiple ribs for easy handling. The user holds the cap to install the lens cone on the laser system, and pulls the cap to unsnap it from the lens cone. The lens cone is attached to the laser system with a bayonet mount that provides tactile feedback to the user.

In an ophthalmic surgical laser system, a patient interface device for coupling a patient's eye to the laser system includes a lens cone with a frustoconical shaped shell for coupling to the laser system and a suction ring for coupling to the patient's eye, the lens cone and the suction ring being joined together by clamping. A cap is provided for use with the lens cone as an installation aid. In the configuration supplied to the user, the lens cone is partially embedded in and snapped to the cap. The cap has a portion with a relatively large diameter and multiple ribs for easy handling. The user holds the cap to install the lens cone on the laser system, and pulls the cap to unsnap it from the lens cone. The lens cone is attached to the laser system with a bayonet mount that provides tactile feedback to the user.

Method for providing control data for an ophthalmic surgical laser (18) of a treatment device (10), wherein the method comprises the following steps performed by a control device (20): - Determining at least one cross-sectional area (14, 16) in a cornea (26) of a human or animal eye (30), - Defining an incision path (17, 17') which extends from an outer surface of the cornea (26) to at least one of the cut surfaces (14, 16), wherein the incision path (17, 17') has at least two sections (17a, 17b, 17c) with different slope values ​​between the outer surface and the respective cut surface (14, 16), and wherein the incision path (17, 17') terminates at an obtuse angle in the respective cut surface (14, 16), - Providing control data for controlling the ophthalmic surgical laser (18) which includes at least the defined incision path (17, 17'), wherein a path profile with a minimum area is calculated in a cross-section along the optical axis of the eye to define the incision path (17, 17').

Method for providing control data for an ophthalmic surgical laser (18), wherein the method comprises the following steps performed by a control device (20): - Determining refractive error data for at least one eye-specific parameter describing a refractive error and / or a geometry causing the refractive error of a human or animal eye (36) (S1), - based on the determined refractive error data: Determining a lenticule geometry that describes the dimensions of a lenticule (12) and its position (S2), - Defining a posterior interface (14) of the lenticel (12) and an anterior interface (16) of the lenticel (12) as intersection surfaces to form the lenticel (12, S3), - Defining at least two differently positioned incision paths (46, 48), each extending from a predetermined incision site on an outer surface of the cornea (17) to one of the defined interfaces (14, 16) (S4); wherein the predetermined incision sites are at a predetermined angle to each other about a predetermined reference point, and wherein only one of the incision paths (46, 48) extends only to the defined anterior interface (16) within a lenticule rim (40) where the defined anterior (16) and the defined posterior interface (14) meet; wherein the further incision path (48) lies outside the lenticule rim (40) and within the larger of the two interfaces (14, 16), and - Providing control data for controlling the ophthalmic surgical laser (18) which describe the at least two specified incision paths (46, 48) and the specified interfaces (14, 16) (S7).

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.

Method for providing control data for an ophthalmic surgical laser (18) of a treatment device (10), wherein the method comprises the following steps performed by means of a control device (20): - Determining a first and at least a second cross-sectional surface (14, 16) in a cornea (26) of a human or animal eye, - Establishing an incision path which, starting from an outer surface of the cornea (26), divides and extends on the one hand to the first cutting surface (14) and on the other hand to at least the second cutting surface (16), - wherein the incision path has a first path (17a) extending from the outside into a volume of the cornea (26), and which splits at a node (17d) into a second path (17b) and at least a third path (17c), wherein the second path (17b) extends from the node (17d) to the first cut surface (14) and the at least third path (17c) extends from the node (17d) to the at least second cut surface (16), - Providing control data for controlling the ophthalmic surgical laser (18), which includes at least the defined incision path, characterized in that - the second and third routes (17c) enclose an angle between 70 and 120 degrees at the node.

Embodiments of this invention generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incision. 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 form a top lenticular incision and a bottom lenticular incision of a lens in the subject's eye.

The invention relates to a method for providing secondary control data for an ophthalmic laser (12) of a treatment device (10), wherein the method comprises the following steps performed by a control unit (18): determining the respective position of at least one primary cut surface (24) in the cornea (28) resulting from a previous treatment of the cornea (28), based on the secondary anatomy of the cornea (28) to be treated as described in the secondary anatomy data; determining one secondary tissue lenticule to be separated from the cornea (28) based on the secondary anatomy of the cornea (28) and the surgical procedure, wherein the at least one secondary tissue lenticule is defined by the at least one primary cut surface (24) and at least one secondary cut surface (26) to be generated;Providing secondary control data for controlling the ophthalmic surgical laser (12) to generate at least one secondary cutting surface (26) in the cornea (28).;

Method for providing control data for an ophthalmic surgical laser, wherein the method comprises the following steps performed by a control device (20): - Determining refractive error data describing a degree of refractive error of a human or animal eye (40) (S1), - Determining an actual geometry of a correction area (32) of a cornea (17) of the eye (40), which describes three-dimensional dimensions of the correction area (32) of the cornea (17) (S2), - based on the determined refractive error data and the determined actual geometry: Determining a target geometry of the correction area (32) that describes a reduction component (44) of the correction area (32) with a corneal thickness reduced compared to the actual geometry, and / or a thickening component (42) with a corneal thickness increased compared to the actual geometry; wherein the determined target geometry fulfills a predefined refractive error reduction criterion that specifies suitability for reducing the degree of refractive error (S3), - Specifying the angle of rotation and the axis of rotation (31) depending on: a) a result of a comparison of the determined actual geometry with the determined target geometry, and / or b) the determined visual impairment data (S5), - based on the determined actual geometry: Determining interfaces (14, 16) of a lenticel (12) within the correction area (32), which extends at least partially over the correction area (32), wherein a portion of the lenticel (12) is designed such that, when the lenticel (12) is rotated (D) into the thickening portion (42) about the specified axis of rotation (31) passing through the cornea (17) and about the specified angle of rotation, it transforms the correction area (32) from the determined actual geometry into the determined target geometry (S4), - Defining at least one incision path as access for an instrument to rotate the lenticule (12), which extends from a predetermined incision site on an outer surface of the cornea (17) to one of the defined interfaces (14, 16) (S7), and - Providing control data that describe the determined interfaces (14, 16) for forming the lenticel (12), the at least one determined incision path, the specified axis of rotation (31) and a rotation of the lenticel (12) about the specified angle of rotation (S6).

Laser eye surgery is in recent years more and more augmented and supported by the application of various photodisruptive laser pulse applications to the eye tissue. The here described inventions relates to several methods and system for improved laser eye surgery using photodisruptive laser pulses.

The present invention relates to a patient interface device in an ophthalmic surgical laser system for coupling an eye of a patient to the laser system, the patient interface device comprising a lens cone having a frustoconical housing for coupling to the laser system and a suction ring for coupling to the eye of the patient, the lens cone and the suction ring are connected together or integrally formed into one piece by clamping. A cap is provided for use with the lens cone as a mounting aid. In a configuration for supply to a user, the lens cone is partially embedded in and engaged with the cap. The cap has a relatively large diameter portion and a plurality of ribs that are easy to handle. The user holds the cap to mount the lens cone on the laser system, and pulls the cap to unbuckle the cap from the lens cone. The lens cone is attached to the laser system by a bayonet mount.

Method for controlling an ophthalmic surgical laser (18) for separating at least one volume body (12) with a predefined posterior interface (14) and a predefined anterior interface (16) from a human or animal cornea (32), comprising: - controlling the laser (18) by means of a control device (20) such that it emits pulsed laser pulses into the cornea (32) in a predefined pattern, wherein the control device (20) controls the laser beam (24) such that the volume body (12) is divided into at least two individual bodies (38, 40, 42) by means of photodisruption through an interaction of the individual laser pulses with the cornea (32), and the totality of the individual bodies (38, 40, 42) includes the posterior and anterior interfaces (14, 16) of the volume body (12), and wherein the laser (18) is controlled in this manner becomes,that at least one cut (36) or at least one opening is produced in the cornea (32) at a predefined angle and / or with a predefined geometry, wherein the cut (36) or the opening intersects an interface (14, 16) of the volume body (12) and extends to a surface (26) of the cornea (32) such that the individual bodies (38, 40, 42) of the volume body (12) can be removed from the cornea (32) via the cut (36) or the opening, and wherein the surface (26) of the cornea (32) is an artificially created surface of the eye by removing or moving an uppermost corneal layer and / or by producing a corneal flap.

A one-piece patient interface device for coupling an eye of a patient to an ophthalmic surgical laser system includes a tapered base having a rigid frustoconical housing for coupling to the laser system, and a flexible suction ring integrally joined to a lower end of the rigid housing for coupling to the eye of the patient. The suction ring has a circular skirt extending downwardly from a base portion, a septum extending from the base portion and disposed within the skirt, and a contact lens held by the septum to cover the central opening. When the skirt contacts a surface of the eye, the skirt, the septum, the contact lens, and the eye surface form a vacuum chamber where a vacuum may be applied to secure the patient interface device to the eye. The parameters of the suction ring are optimized to fit a wide range of eye sizes, including smaller eyes.

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 for coupling to the patient's eye. The suction ring includes a gripper with an opening for receiving and retaining the lens cone, and a flexible skirt joined to the gripper for coupling to the eye with a vacuum force. The flexible skirt includes a circular inner edge and a circular outer edge for contacting the eye surface, and a plurality of circumferentially distributed scleral support protrusions protruding from a circumferential side wall. The end surface of the scleral support protrusions are sloped in a side cross-sectional view. The scleral support protrusions have a length to width ratio from 1.1 to 2.1, and an arc-angle ratio of the scleral support protrusions to the gaps between them is from 2.2 to 3.0. The scleral support protrusions contact the surface of the eye when the skirt is docked to the eye, which minimize intraocular pressure increase due to docking and applanation while still achieving a good vacuum seal between the suction ring and the eye. The scleral support protrusions function to prevent major deformation of the sclera when the cornea is applanated.