Patent ID: 7998135

Claim:
An ophthalmological apparatus, comprising: a laser for providing a laser beam for treating a cornea of an eye of a patient; a fixation light source for emitting a fixation light beam at a visible wavelength, the fixation light beam provided for visual fixation by the patient; a first camera adapted for focusing on a retinal plane of the eye to capture a first image showing a retinal area including a fovea of the eye, wherein the first camera is positioned to receive a portion of the fixation light beam reflected from the retina of the eye so that the first image includes a visible light spot generated by the fixation light beam on the retina; a computer performing an evaluation function for determining from the first image whether the light spot is sufficiently precise on the fovea to determine if the patient properly fixates the fixation light beam with the eye; a second camera focused on a plane of a pupil of the eye for capturing a second image showing the pupil; wherein the computer performs a superimposing function for superimposing the first and second images to allow a determination of a positional relationship of the light spot and fovea with respect to the pupil.