Apparatus for opthalmological, in particular refractive, laser surgery

摘要

An apparatus for ophthalmological, in particular refractive, laser surgery includes a laser-beam source (20) for emitting a focused treatment laser beam (20′) and also includes an optical-coherence interferometric measuring device (34), for example an OLCR pachymeter, for measuring the z-position of a predetermined point of an eye to be treated in the coordinate system of the laser-surgery apparatus. A computer (C) serving as evaluating and control unit has been set up to assess, on the basis of the measured z-position, whether a desired treatment point of the eye in the z-direction falls in the focal plane of the treatment laser beam or is offset in relation to said plane. Depending on whether or not the patient is correctly positioned in relation to the focal plane, the computer (C) can bring about a range of actions.

主权项

1. Apparatus for ophthalmological laser surgery, comprising:
a laser-beam source for emitting a focused treatment laser beam, an optical-coherence interferometric measuring device for measuring the distance of a predetermined point or region of an eye to be treated from a reference point which is in a known relationship to the focal position of the treatment laser beam, and an evaluating and control unit which has been set up to register, on the basis of the measured distance data of the measuring device, the coincidence or divergence of a desired location of action of the treatment laser beam on or in the eye and of the focal position of the treatment laser beam and in the case of coincidence or divergence to bring about a predetermined output action, wherein the predetermined output action in the case of coincidence or divergence includes a display of a needed adjustment of a patient positioning in order for the desired location of action of the treatment laser beam on or in the eye to coincide with the focal position of the treatment laser, wherein the display of the needed adjustment includes both a direction and a distance necessary for the desired location of action of the treatment laser beam on or in the eye to coincide with the focal position of the treatment laser.