A laser system is calibrated with a tomography system capable of measuring locations of structure within an optically transmissive material such as a tissue of an eye. Alternatively or in combination, the tomography system can be used to track the location of the eye and adjust the treatment in response to one or more of the location or an orientation of the eye. In many embodiments, in situ calibration and tracking of an optically transmissive tissue structure such as an eye can be provided. The optically transmissive material may comprise one or more optically transmissive structures of the eye, or a non-ocular optically transmissive material such as a calibration gel in a container or an optically transmissive material of a machined part.

An ophthalmological device for processing eye tissue comprises a laser source for generating a pulsed laser beam, a focusing optical unit for focusing a processing laser beam into the eye tissue, and a scanner system for deflecting the processing laser beam into the eye tissue. The ophthalmological device additionally comprises a beam splitting system disposed upstream of the scanner system and configured to generate the processing laser beam from the pulsed laser beam in such a way that the processing laser beam comprises two beam parts, wherein one of the beam parts is focused by the focusing optical unit onto the lower outer surface of a lenticule to be cut in the eye tissue, and the other beam part is focused onto the upper outer surface of the lenticule to be cut, such that both the lower and the upper outer surfaces are processed when the processing laser beam is deflected into the eye tissue.

An ophthalmological apparatus comprises a laser source for producing a pulsed laser beam, a scanner system for deflecting the pulsed laser beam at a treatment speed in the eye tissue along a scanning treatment line, a first scanning apparatus connected upstream of the scanner system for deflecting the pulsed laser beam and for producing a first scanning movement component superposed on the scanning treatment line in a first scanning direction at a first scanning speed that is higher as compared to the treatment speed, and a second scanning apparatus connected upstream of the scanner system for deflecting the pulsed laser beam and for producing a second scanning movement component, which is superposed on the first scanning movement component in a second scanning direction, which is at an angle to the first scanning direction, at a second scanning speed that is higher as compared to the first scanning speed.

A target volume of ocular tissue of an irido-corneal angle of an eye is treated by moving a focus of a laser through the target volume of ocular tissue, and photodisrupting the target volume of ocular tissue at a plurality of spots as the focus is moved through the target volume of ocular tissue. The focus is moved by transverse scanning the focus between at least one of: a first circumferential boundary and a second circumferential boundary of the target volume of ocular tissue, and a first azimuthal boundary and a second azimuthal boundary of the target volume of ocular tissue, and axial scanning the focus between a distal extent and a proximal extent of the target volume of ocular tissue.

Transcorneal and fiberoptic laser delivery systems and methods for the treatment of eye diseases wherein energy is delivered by wavelengths transparent to the cornea to effect target tissues in the eye for the control of intraocular pressure in diseases such as glaucoma by delivery systems both external to and within ocular tissues. External delivery may be affected under gonioscopic control. Internal delivery may be controlled endoscopically or fiberoptically, both systems utilizing femtosecond laser energy to excise ocular tissue. The femtosecond light energy is delivered to the target tissues to be treated to effect precisely controlled photodisruption to enable portals for the outflow of aqueous fluid in the case of glaucoma in a manner which minimizes target tissue healing responses, inflammation and scarring.

A method for producing a cut surface in a transparent material using optical radiation. A laser device separates the material using optical radiation and includes an optical unit focusing the radiation along an optical axis into an image field defining an image-field size. A focal position is adjusted transversely along the axis, producing a cut surface extending substantially parallel to the axis and, in projection along the axis, is a curve having a maximum extent. The focus is displaced by adjustment of the focal position along a trajectory curve lying in the cut surface. The cut surface has a maximum extent which is greater than the image-field size. The focal position is moved transverse to the axis along the curve. The image field is displaced transversely, and the focal position is adjusted in an oscillating fashion along the axis on the curve between an upper and lower axial focus position.

A planning device for generating control data, a treatment apparatus for refraction correction eye surgery and a method for generating control data for such a treatment apparatus which allows an improved subsequent refraction correction. The planning device includes a calculation processor for defining a cut surface of the cornea for post-treatment, wherein the calculation device is designed such that a change of thickness of the epithelium is taken into account in the calculation, which was caused essentially by a pretreatment.

An ophthalmic laser procedure for forming a lenticule in a cornea and extracting the lenticule from the cornea to accomplish vision correction. An ophthalmic laser system is used to form top and bottom lenticule incisions defining a lenticule in between, and further to form top and/or bottom entry cuts that respectively end unambiguously near the top or bottom lenticule surface. The bottom entry cut intersects both the top and bottom lenticule incisions but ends near the bottom lenticule incision. The entry cuts allow the surgeon to insert a surgical tool which reaches the intended top or bottom lenticule surface without ambiguity. The lenticule has an optical zone in the center that defines the optical power of the lenticule, and a transition zone in the periphery, where the end points of the entry cuts are located in the transition zone.

A motor position compensation method for an ophthalmic surgical laser system employs a deep artificial neural network to characterize motor following errors of the motors of the system. The artificial neural network is trained using a large number of commanded motor positions and corresponding measured actual motor positions (measured by encoders associated with the motors) as training data, to obtain a trained artificial neural network that can predict the actual motor position for any commanded motor position. Before executing a treatment scan, the original commanded motor positions calculated from the intended scan pattern are inputted to the trained artificial neural network to predict the actual motor positions, and the predicted actual motor positions are used to adjust the original commanded motor positions. The adjusted commanded motor positions are then used to perform the treatment scan, which produces an actual scan pattern that more closely match the intended scan pattern.

A method is disclosed for determining a current position of a patient interface of an eye surgical laser for an eye relative to an optical axis of a laser beam of a treatment apparatus. The method includes determining a target position of the patient interface relative to the optical axis, positioning the patient interface in a preset area in front of the optical axis, illuminating the patient interface by means of an illumination device, capturing a Purkinje image by means of the optical capturing device, comparing the captured Purkinje image to the optical axis and determining the current position of the patient interface depending thereon, comparing the current position to the target position and with a deviation, and outputting a control signal to a control device of the treatment apparatus. A treatment apparatus, a computer program and a computer-readable medium are disclosed for carrying out the method.