Methods and systems for tracking a position and torsional orientation of a patient's eye. In one embodiment, the present invention provides methods and software for registering a first image of an eye with a second image of an eye. In another embodiment, the present invention provides methods and software for tracking a torsional movement of the eye. In a particular usage, the present invention tracks the torsional cyclorotation and translational movement of a patient's eye so as to improve the delivery of a laser energy to the patient's cornea.

Optical correction methods, devices, and systems reduce optical aberrations or inhibit refractive surgery induced aberrations. Error source control and adjustment or optimization of ablation profiles or other optical data address high order aberrations. A simulation approach identifies and characterizes system factors that can contribute to, or that can be adjusted to inhibit, optical aberrations. Modeling effects of system components facilitates adjustment of the system parameters.

Devices, systems, and methods for treating and/or determining appropriate prescriptions for one or both eyes of a patient are particularly well-suited for addressing presbyopia, often in combination with concurrent treatments of other vision defects. High-order spherical aberration may be imposed in one or both of a patient's eyes, often as a controlled amount of negative spherical aberration extending across a pupil. A desired presbyopia-mitigating quantity of high-order spherical aberration may be defined by one or more spherical Zernike coefficients, which may be combined with Zernike coefficients generated from a wavefront aberrometer. The resulting prescription can be imposed using refractive surgical techniques such as laser eye surgery, using intraocular lenses and other implanted structures, using contact lenses, using temporary or permanent corneal reshaping techniques, and/or the like.

A method for providing control data for an ophthalmological laser of a treatment apparatus is disclosed. The method provides the steps of: ascertaining visual disorder correction data for correcting a cornea of an eye; determining Zernike polynomials from the ascertained visual disorder correction data; ascertaining an offset vector from a pupil center to a further preset reference center of the eye; calculating corrected Zernike polynomials, in which higher order aberrations are calculated by means of an adaptation of the corresponding Zernike polynomials by the offset vector; and providing the control data for the treatment apparatus, wherein the control data is generated by means of the corrected Zernike polynomials.

The present invention relates to a method for recommending a vision correction surgery, and the method according to one aspect of the present invention comprises: obtaining an examination data of a subject; predicting whether the vision correction surgery is suitable for the subject from the examination data; when the vision correction surgery is suitable for the subject, predicting whether the vision correction surgery using a laser is available for the subject from the examination data; when the vision correction surgery using the laser is available for the subject, calculating corneal shape factor prediction values of the subject after a standard vision correction surgery and a custom vision correction surgery from the examination data; and when the vision correction surgery using the laser is available for the subject, suggesting a vision correction surgery corresponding to the subject from the examination data.

Systems and methods for corneal laser ablation for primary vision correction include topographic guided ablation. A laser ablation pattern is derived at least in part from corneal topographic data and epithelial thickness data. The laser ablation pattern may limit post-surgical non-uniformity of the thickness of the epithelial layer.

Systems and methods for corneal laser ablation for primary vision correction include topographic guided ablation. A laser ablation pattern for removal of astigmatism is derived at least in part from corneal topographic data rather than manifest astigmatism. Laser ablation patterns for treatment of high order aberrations of the cornea may also be based on corneal topographic data. Spherical corrections may be based on manifest refraction, eye models, or wavefront aberrometry.

A method for providing control data for an ophthalmological laser of a treatment apparatus is provided. As steps, the method comprises ascertaining a correction profile for correcting a visual disorder of a cornea from predetermined examination data; ascertaining data of a virtual postoperative cornea, which is expected by the correction by means of the correction profile, wherein the data of the virtual postoperative cornea is determined depending on a migration model, in which regrowth of an epithelial layer of the cornea is modeled; ascertaining a correction difference between an originally planned correction with the correction profile and a virtually achieved correction, which is determined from the ascertained data of the virtual postoperative cornea; adapting the correction profile depending on the migration model if the correction difference is above a preset threshold value; and providing the control data for the ophthalmological laser, which includes the adapted correction profile.

Methods and systems wherein laser induced refractive index changes by focused femtosecond laser pulses in optical polymeric materials or optical tissues is performed to address various types of vision correction.

Methods and systems wherein laser induced refractive index changes by focused femtosecond laser pulses in optical polymeric materials or optical tissues is performed to address various types of vision correction.