An ophthalmological device for surgical treatment of a cornea comprises a laser source, a focusing optical module, a scanner system, and an electronic circuit configured to control the scanner system to move the focus of the pulsed laser beam generated by the laser source to cut inside the cornea a lenticule, an opening incision in an exterior surface of the cornea, and two access channels which connect the opening incision to the posterior lenticule surface and to the anterior lenticule surface to provide access for a surgical tool through the opening incision to the posterior lenticule surface and the anterior lenticule surface, respectively. The access channels are cut to overlap at least partially from a top view perspective onto the cornea.

Embodiments of this invention generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for photorefractive keratectomy. In an embodiment, an ophthalmic surgical laser system comprises a laser source generating a pulsed laser beam and a laser delivery system delivering the pulsed laser beam to a cornea of an eye. A patient interface couples to and constrains the eye relative to the laser delivery system. A controller controls the laser delivery system to perform an anterior surface volume dissection on the cornea.

The present invention relates to apparatus for cutting out a human or animal tissue, such as a cornea, or a lens, said apparatus including a treatment device for producing a pattern consisting of at least two impact points in a focusing plane from a L.A.S.E.R. beam generated by a femtosecond laser (1), the treatment device being positioned downstream from said femtosecond laser, remarkable in that the treatment device comprises an optical focusing system (5) for focusing the L.A.S.E.R. beam in a cutting-out plane, and a control unit (6) able to control the displacement of the optical focusing system along an optical path of the L.A.S.E.R. beam for displacing the focusing plane in at least three respective cutting-out planes so as to form a stack of surfaces for cutting out the tissue.

An ophthalmological device for surgical treatment of a cornea comprises a laser source, a focusing optical module, a scanner system, and an electronic circuit configured to control the scanner system to move the focus of the pulsed laser beam generated by the laser source to cut inside the cornea a lenticule and a venting channel which comprises an opening incision in a peripheral area of an exterior surface of the cornea, outside a perimeter of the lenticule from a top view perspective onto the cornea, and the venting channel connecting fluidically the posterior lenticule surface and/or the anterior lenticule surface to the opening incision, to enable venting of gas, produced by cutting the lenticule inside the cornea, through the opening incision to the exterior of the cornea.

The present invention discloses a method and an apparatus for treating an ocular tissue. The method for treating the ocular tissue includes generating a femtosecond laser beam from a laser source; orientating the femtosecond laser beam toward the ocular tissue; and defining a target area in the ocular tissue using the femtosecond laser beam, wherein the target area contains a sharp-edge part and a to-be-removed part, in which the sharp-edge part has a minimum thickness being gradually reduced to zero and is ablated by the femtosecond laser beam while the target area is defined; and removing the to-be-removed part of the target area from the ocular tissue.

A method for forming an incision in an eye, the method including performing a first pass of a first laser beam along a path within an eye, wherein after completion of the first pass there exists a residual uncut layer at an anterior surface of a cornea of the eye. The method further including performing a second pass of a second laser beam only along a portion of the path that contains the residual uncut layer, wherein after completion of the second pass, the residual uncut layer is transformed into a full complete through surface incision.

The disclosure provides a system that may: determine first multiple focal point distances associated with respective multiple positions of a plane orthogonal to a laser beam; determine second multiple focal point distances associated with the respective multiple positions via for each position of the multiple positions: determine multiple intensity values associated with respective multiple interim focal point distances, each interim focal point distance greater than each focal point distance of the first multiple focal point distances associated with the position; determine an interim focal point distance respectively associated with a maximum intensity value; and determine a focal point distance as the interim focal point distance; and determine a depth of at least one incision in an eye based at least on differences between each of the second multiple focal point distances and each respective one of the first multiple focal point distances.

The invention relates to a method for providing control data of an eye surgical laser (18). A control device (20) ascertains (S1) a lenticule geometry of a lenticule (12) to be separated from predetermined visual disorder data of a human or animal eye (36), wherein the lenticule geometry is defined by means of a refractive power value to be corrected and a lenticule diameter, ascertains (S2) a correction value for compensating for a deformation of the lenticule (12), which is generated by at least one contact element (28) of the treatment apparatus (10), wherein the correction value is determined by means of at least one preceding measurement of the treatment apparatus (10), ascertains (S3) a deformation geometry of the lenticule (12), wherein a deformation refractive power value is calculated depending on the refractive power value to be corrected and the correction value and a deformation diameter is calculated depending on the lenticule diameter and the correction value, and provides (S4) control data for controlling the eye surgical laser (18), which uses the deformation geometry for the separation of the lenticule (12).

The invention relates to a method for providing control data of an eye surgical laser (18). A control device (20) ascertains (51) a lenticule geometry of the lenticule (12) to be separated from predetermined visual disorder data of a human or animal eye (36), wherein the lenticule geometry is defined by means of a refractive power value to be corrected and a lenticule diameter, ascertains (S2) a correction value for compensating for a deformation of the lenticule (12), which is generated by at least one contact element (28) of the treatment apparatus (10), wherein the correction value is determined by means of at least one preceding measurement of the treatment apparatus (10), ascertains (S3) a deformation geometry of the lenticule (12), wherein the deformation geometry is defined by means of the refractive power value and a deformation diameter, wherein the deformation diameter is calculated depending on the lenticule diameter and the correction value, and provides (S4) control data for controlling the eye surgical laser (18), which uses the deformation geometry for the separation of the lenticule (12).

Methods and related apparatus for real-time process monitoring during laser-based refractive index modification of an intraocular lens. During in situ laser treatment of the IOL to modify the refractive index of the IOL material, a signal from the IOL is measured to determine the processing effect of the refractive index modification, and based on the determination, to adjust the laser system parameters to achieve intended processing result. The signal measured from the IOL may be a fluorescent signal induced by the treatment laser, a fluorescent signal induced by an external illumination source, a temporary photodarkening effect, a color change, or a refractive index change directly measured by phase stabilized OCT.