Patent attributes
An ophthalmic apparatus for obtaining differences between the pupil positions in photopia and scotopia accurately, and a corneal surgery apparatus for ablating a cornea of an eye by laser beam irradiation allowing for the differences. The ophthalmic apparatus has devices for inputting a first image of an anterior eye segment in photopia and a second one in scotopia, for obtaining pupil information in the images and differences between the pupil information in photopia and that in scotopia, and for outputting the differences. The corneal surgery apparatus has devices for irradiating the cornea with a laser beam, for aligning an irradiation position with the eye, for inputting differences between the pupil positions in photopia and scotopia, for detecting the photopic pupil position, for obtaining an alignment position of the laser beam based on the pupil position and the positional difference, and for controlling the alignment device based on the alignment position.
