Abstract:
The invention relates to a laser treatment unit for performing eye surgery, comprising a contact glass (23), which can be placed onto the eye (21) and via which a treatment laser beam (2) passes. A safety mechanism (24, 25) is provided that displaceably holds the contact glass (23) in such a manner that the contact glass retreats when the contact glass (23) is subjected to the action of a force contrary to the direction of incidence of the laser beam. The safety mechanism (24, 25) enables this retreating when a force is greater than a force limit value (Fmin) and holds the contact glass (23) in a fixed manner when the force is less than the force limit value.
Abstract:
The present invention is directed to a fixation mark which is to be displayed to the patient in order to prevent unwanted eye movements during the treatment of an eye without taxing the patient's ability to concentrate. In the method according to the invention, the fixation mark which is to be displayed and on which the patient must orient the eye to be treated by foveal focusing is projected in the field of vision of the eye to be treated. To prevent unwanted eye movements, the fixation mark is moved in the field of vision of the patient. The movement is carried out in such a way that the patient can easily follow the fixation mark. The proposed technical solution relates to a fixation object which can be used in ophthalmologic examination devices as well as in ophthalmologic treatment devices. Since the patient is occupied in following the fixation object with his/her eyes, the risk of glancing away is substantially reduced. In this way, unwanted and uncontrolled movements of the eye being treated can be minimized.
Abstract:
A method of forming a cut which encloses a partial volume within a transparent material, by generating optical breakthroughs in the material by means of laser radiation focused into the material along an optical axis in which the focal point is three-dimensionally adjusted so as to form the cut by serial arrangement of the optical breakthroughs, wherein the focal point is adjusted along a spatial spiral, which is located in the cut and extends along a main axis that is at substantially right angles to the optical axis.
Abstract:
The present invention is directed to a fixation mark which is to be displayed to the patient in order to prevent unwanted eye movements during the treatment of an eye without taxing the patient's ability to concentrate. In the method according to the invention, the fixation mark which is to be displayed and on which the patient must orient the eye to be treated by foveal focusing is projected in the field of vision of the eye to be treated. To prevent unwanted eye movements, the fixation mark is moved in the filed of vision of the patient. The movement is carried out in such a way that the patient can easily follow the fixation mark. The proposed technical solution relates to a fixation object which can be used in ophthalmologic examination devices as well as in ophthalmologic treatment devices. Since the patient is occupied in following the fixation object with his/her eyes, the risk of glancing away is substantially reduced. In this way, unwanted and uncontrolled movements of the eye being treated can be minimized.
Abstract:
A planning system for generating control data, a treatment device for ophthalmic surgery to correct refraction, and a method for generating control data for such a treatment device, the method enabling easy continuation of an interrupted treatment or correction of a previous treatment. To this end, the planning system has a calculating device configured to define a corneal incision surface, wherein the calculating device determines the new corneal incision surface such that the existing corneal incision surface is incised by at least a part of the new corneal incision surface at an angle of between 60° and 120°.
Abstract:
The invention relates to a method for producing cuts in a transparent material, in particular in the cornea, by creating optical openings in said material by means of laser radiation that is focused in said material, whereby the focal point is displaced in order to produce the cut from a surface grid-type array of optical openings arranged in sequence. The focal point is displaced along a trajectory and optical openings along said trajectory that are adjacent are not produced immediately after one another. In addition, the surface grid-type array of optical openings is constructed from at least two sub-grids, the optical openings of which are processed sequentially grid by grid.
Abstract:
The invention relates to a method for producing cuts in a transparent material, in particular in the cornea, by creating optical openings in said material by means of laser radiation that is focused in said material, whereby the focal point is displaced in order to produce the cut from a surface grid-type array of optical openings arranged in sequence. The focal point is displaced along a trajectory and optical openings along said trajectory that are adjacent are not produced immediately after one another. In addition, the surface grid-type array of optical openings is constructed from at least two sub-grids, the optical openings of which are processed sequentially grid by grid.
Abstract:
The invention relates to a method for forming curved sections in a transparent material, especially in a cornea, by producing optical breaks at various points in the material by means of pulsed laser beams focused into the material. The laser beam is deviated in a two-dimensional manner from a deviation point in order to form the section by arranging the optical breaks in a sequence. The two-dimensional deviation occurs such that the areas of the optical opening along a curve, whereon the optical openings are arranged in a sequence, are arranged at a distance in relation to the deviation point according to an angle function which is not linear and which is adapted to the curvature of the section. The areas along the curve adjacent to optical openings inside a specific tolerance range are arranged at an even distance.
Abstract:
A planning system for generating control data, a treatment device for ophthalmic surgery to correct refraction, and a method for generating control data for such a treatment device, by which method it is easily possible to continue an interrupted treatment or correct a previous treatment. To this end, the planning system has calculating means for defining a corneal incision surface, wherein the calculating means determine the new corneal incision surface such that the existing corneal incision surface is incised by at least a part of the new corneal incision surface at an angle of between 60° and 120°.
Abstract:
The invention relates to a laser treatment unit for performing eye surgery, comprising a contact glass (23), which can be placed onto the eye (21) and via which a treatment laser beam (2) passes. A safety mechanism (24, 25) is provided that displaceably holds the contact glass (23) in such a manner that the contact glass retreats when the contact glass (23) is subjected to the action of a force contrary to the direction of incidence of the laser beam. The safety mechanism (24, 25) enables this retreating when a force is greater than a force limit value (Fmin) and holds the contact glass (23) in a fixed manner when the force is less than the force limit value.