Patent ID: 6238385
Filing Date: 2001-05-29
Classification: A61F

Abstract:
A laser treatment apparatus for coagulating a diseased part of a fundus of a patient's eye with a treatment laser beam, the treatment laser beam being guided to the diseased part using an aiming beam, the apparatus comprising:a laser beam irradiation optical system which irradiates the diseased part with the treatment laser beam;an illumination optical system which illuminates the fundus of the patient's eye;an observation optical system through which the fundus is observed; anda target projection optical system which projects a target of a two dimensional shape having a center and indicating a distance from the center, and which forms an image of the target on the fundus;wherein fixation of the patient's eye at the center of the target causes a center of the target image to be positioned at a central fovea of the fundus; andwherein an optical path of the target projection optical system is located at a position that is not influenced by a driven mirror disposed in the laser beam irradiation optical system.