Patent ID: 7749216

Claim:
A corneal surgery apparatus comprising: a laser source which emits an ultrashort pulse laser beam with a wide wavelength band; an irradiation optical system for dividing the laser beam emitted from the laser source into measurement light and reference light by using a dividing and combining mirror, collecting the measurement light into a spot of a given size and irradiating a cornea with the measurement light, combining the measurement light reflected by the cornea and the reference light reflected by a reference mirror by using the dividing and combining mirror, and guiding the combined light to a photo-detector and obtaining an interference signal, the irradiation optical system comprising a scanning unit for two-dimensionally scanning the measurement light to be irradiated onto the cornea; a changeover switch for switching between a measurement mode of measuring a three-dimensional shape of the cornea and a surgery mode of ablating the cornea; a control unit that, when in the surgery mode, removes the dividing and combining mirror from an optical path of the irradiation optical system, inserts a correction optical system which changes the spot size into the optical path, and increases an output of the laser beam; an eye position detection unit which detects a positional deviation of an eye of a patient by detecting a pupil; and a calculation unit that, when in the measurement mode, obtains the three-dimensional shape of the cornea based on a detection signal from the photo-detector, positional information of the scanning unit, and positional information of the reference mirror.