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.

Methods for treating presbyopia in a patient's eye involve inducing spherical aberration in a central area of the pupil. In embodiments, refractive properties of an eye are measured to obtain a baseline refractive correction. A lens for wearing on the eye is provided, or an optical device is implanted in the eye, or corneal tissue is removed to create spherical aberration or a distribution of spherical aberrations beyond the baseline refractive correction in the central area of the pupil. The central area of the pupil has a diameter of between 1.5 mm and 4.0 mm and has negligible spherical aberration without the treatment.

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.

In some examples, a laser-based ophthalmological surgical system (hereinafter system) includes a therapeutic radiation source configured to emit therapeutic radiation with a first wavelength. The system may also include a probe radiation source configured to emit probe radiation with a second wavelength different than the first wavelength. The system may also include one or more optical elements configured to direct the therapeutic radiation and the probe radiation into an eye of a patient and to collect reflected probe radiation from the eye of the patient. The reflected probe radiation may be indicative of an amount of therapeutic radiation exposure of the eye of the patient. The system may also include a photodetector configured to receive the reflected probe radiation from the one or more optical elements and to generate a photocurrent indicative of the amount of therapeutic radiation exposure of the eye of the patient.

A corneal ablation system for correcting vision by using a laser is provided. The corneal ablation system includes: an operation device for creating an integrated corneal ablation plan for correcting a shape and a curvature error of a cornea based on corneal status data; a laser control unit for controlling a laser module according to an ablation position and an ablation shape of the cornea based on the integrated corneal ablation plan transmitted from the operation device; and the laser module for generating a laser and transmitting the laser to an optical unit under control of the laser control unit.

A method for determining spherical aberration parameters for a corneal laser treatment to treat presbyopia may include performing pupillometry to measure various actual pupil diameters of a patient from a photopic diameter to a mesopic diameter. An actual pupil center of the patient may also be measured. The measured pupil diameters and the pupil center may be used to customize the spherical aberration parameters to the eye of the patient for improved ocular results after treatment.

The invention relates to a method for providing control data for presbyopia reversion for an ophthalmological laser (12) of a treatment apparatus (10). As steps, the method includes determining (S10) presbyopia correction data for presbyopia correction of a cornea (16), wherein an originally uniform visual acuity of the cornea (16) is changed into multifocal areas by application of the presbyopia correction data, wherein the presbyopia correction data is stored in a database (24); retrieving (S12) the stored presbyopia correction data of the cornea (16) from the database (24), if the multifocal areas of the cornea (16) are to be adapted or cancelled at a subsequent point of time; determining (S14) control data for adapting or cancelling the multifocal areas depending on the retrieved presbyopia correction data; and providing (S16) the control data for controlling the ophthalmological laser (12) of the treatment apparatus (10).

Methods, devices, and systems for reprofiling a surface of a cornea of an eye ablate a portion of the cornea to create an ablation zone with an optically correct central optical zone disposed in a central portion of the cornea, and a blend zone disposed peripherally to the central optical zone and at least partially within an optical zone of the eye. The blend zone can have an optical power that gradually diminishes with increasing radius from the central optical zone.

Systems and methods for increasing the amplitude of accommodation of an eye, changing the refractive power of lens material of a natural crystalline lens of the eye, and addressing presbyopia are is provided. Generally, there are provided methods and systems for delivering a laser beam to a lens of an eye in a plurality of laser shots, which are in precise and predetermined patterns results in the weakening of the lens material.

The invention relates to a method for providing control data for an ophthalmological laser of a treatment apparatus for correcting presbyopia, wherein the method includes, as steps, ascertaining first correction data for an eye of a patient for correcting the presbyopia from predetermined visual disorder data; ascertaining second correction data for the other eye of the patient, wherein the second correction data is calculated by means of a calculation operation of the first correction data with a patient-specific parameter; and providing the control data for the ophthalmological laser, which includes the first and second correction data for the respective eyes.