Patent ID: 7203351
Filing Date: 2007-04-10
Classification: A61B,G06T

Abstract:
1. A method of characterizing an optic nerve head, the method comprising the steps of: a) acquiring a topographic image of the optic nerve head; b) defining a topographic model fitted to the topographic image of the optic nerve head about a centre of analysis, wherein the centre of analysis is identified on the optic nerve head, and wherein the topographic model is defined using model morphological parameters and comprises a parabolic surface; c) applying the topographic model to identify a cup region on the topographic image of the optic nerve head by comparing the acquired topographic image to the parabolic surface, wherein the cup region comprises the centre of analysis of the optic nerve head; d) excluding the cup region from the acquired image and refitting the parabolic surface to the acquired image; and e) modeling the shape of the cup superimposed on the model parabolic surface, to define the topographic model of the optic nerve head.