Patent ID: 6932807
Filing Date: 2005-08-23
Classification: A61B,A61F

Abstract:
1. A laser treatment apparatus for irradiating an affected part in the inside of a patient's eye with a treatment laser beam to treat the affected part, while allowing an operator to observe the affected part, including: treatment beam irradiation means including a first irradiation optical system for focusing the treatment laser beam on the inside of the patient's eye; aiming beam irradiation means including a second irradiation optical system for delivering an aiming beam into the patient's eye, the first irradiation optical system and the second irradiation optical system being optically adjusted such that sighting of the treatment laser beam in a direction of an optical axis with respect to the affected part is completed when the aiming beam forms a predetermined spot shape on the affected part in the inside of the patient's eye; sighting adjustment means for adjusting sighting of the aiming beam in a direction of an optical axis with respect to the affected part to adjust the sighting of the treatment laser beam, the sighting adjustment means including movement means for moving a sighting point of the second irradiation optical system in forward-and-backward directions of the optical axis direction; image pickup means including an image pickup optical system for imaging an area including the affected part in the inside of the patient's eye; sighting state detection means for detecting a spot image of the aiming beam from an image picked-up by the image pickup means to detect a sighting state of the aiming beam; movement detection means for detecting movement by the movement means; determination means for determining a direction of the optical axis direction in which the sighting point is to be moved based on results detected by the sighting state detection means and the movement detection means respectively; and movement control means for controlling the movement means based on the determined direction to complete the sighting.