Evaluation of Morphometric and Shape Parameters of Optic Nerve Disk in Norm and Glaucoma based on Optical Coherence Tomography

Abstract

An evaluation of optic nerve disk morphology and size is essential in diagnosis and management of visual impairments, for example glaucoma. A considerable amount of work has been published examining the optic nerve disc size-related parameters and their physiological and pathological associations, however, relatively little information is available describing shape features of the optic nerve disk and their variations in a general population. We applied an optical coherence tomography in order to evaluate morphometric parameters and the shape and their possible changes of the optic nerve disk in a control and primary open angle glaucoma groups. Areas and shapes of the optic nerve disk, a rim and a cup were analyzed. Based on OCT the vertically oval OND had irregular shape, it was vertically-oblique in the control and the glaucoma groups. The cup shape was horizontally-oblique in the control group and had the more vertically-oblique shape in the glaucoma group.