Patent ID: 6471691
Filing Date: 2002-10-29
Classification: A61B,A61F

Abstract:
An ophthalmic treatment apparatus comprising:a laser light source for generating a first laser beam having a given intensity; optical scanning means for deflecting the first laser beam from the laser light source at a predetermined frequency to scan with a variable scanning angle an eye fundus of a patient's eye into which a photosensitive substance that accumulates specifically in neovascular tissues of the eye fundus to be treated has been administered; output means for detecting an intensity of reflected light and fluorescent light from the eye fundus and outputting an image of the eye fundus in accordance with the scanning by the optical scanning means; means for defining a given region of the eye fundus containing the neovascular tissues to be treated in accordance with the outputted image of the eye fundus; and control means for controlling the laser light source to generate a second laser beam having an intensity greater than that of the given intensity and to irradiate the second laser beam in the given region of the eye fundus to cause a photochemical reaction between the second laser beam and the photosensitive substance and thereby destroy or seal off the neovascular tissues.