Alcon, Inc.

Wavelight Gmbh

Evi Goos

Christian Wuellner

Christof Donitzky

Olaf Kittelmann

Mario Abraham

Michael Wittnebel

Claudia Gorschboth

Matthias Foesel

Friederike Rubin-Schwarz

In certain embodiments, an ophthalmic surgical system for adjusting a dimension of an eye includes a camera and a computer. The camera generates a surgical image of the eye in contact with a patient interface, which distorts the cornea. The surgical image includes the pupil with a real pupil diameter. The computer accesses a diagnostic image of the eye with the cornea having a natural curvature. The natural curvature affects the real pupil diameter to yield a diagnostic pupil diameter of the diagnostic image that is different from the real pupil diameter of the surgical image. The computer adjusts the real pupil diameter of the surgical image using an eye model to yield a refracted pupil diameter that takes into account the curvature of the cornea and uses the refracted pupil diameter to compensate for the difference between the diagnostic and real pupil diameters.

Compensating for distortion of images of an eye for a surgical procedure

In certain embodiments, a system for calibrating the focal point of a laser beam comprises a laser, focusing optics, detector optics, a two-photon absorption (TPA) detector, and a computer. The laser generates the laser beam. The focusing optics direct the focal point of the laser beam along a z-axis towards a zero-surface corresponding to a zero-plane, and receives a portion of the laser beam reflected by the zero-surface. The detector optics receive the reflected portion from the focusing optics, and directs the reflected portion towards a TPA detector. The TPA detector senses the peak intensity of the reflected portion, which indicates a proximity of the focal point to the zero-surface, and generates a signal representing the peak intensity of the reflected portion. The computer determines whether the focal point of the laser beam is calibrated in response to the signal representing the peak intensity.

Calibrating the position of the focal point of a laser beam

An apparatus for laser eye surgery comprises a laser module, which is equipped to emit pulsed, focused laser radiation of a variable pulse repetition rate, and a processor-based control unit, which is equipped to receive at least one user input pertaining to a selection of one of several predefined pulse repetition rates over a user input and to control the laser module in accordance with the selected pulse repetition rate. In certain specific embodiments, the user interface enables input of two user entries, each of which relates to a selection of one of several predefined pulse repetition rates. The control unit controls the laser module for a first phase of a laser treatment in accordance with one input, and for a second phase of the laser treatment, it controls the laser module in accordance with the other input.

Apparatus for eye laser surgery and method for performing a transepithelial photorefractive keratectomy

A test device to calibrate the pulse energy of a laser device which provides pulsed laser radiation includes a measuring head with multiple measuring probes. The test device is used in such a way that by means of the laser radiation, multiple test ablations are made on a test surface, in an arrangement corresponding to the relative spatial arrangement of the measuring probes, and the depths of the test ablations are then measured, with simultaneous use of the multiple measuring probes of the measuring head.

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Erlangen, Germany

Evi Goos