Symmetry of Optic Nerve Head Parameters Measured by the Heidelberg Retina Tomograph 3 in Healthy Eyes: The Blue Mountains Eye Study

摘要

INTEROCULAR ASYMMETRY OF THE OPTIC DISC NEURO-retinal rim is well recognized as a sign suggesting glaucoma. Understanding the symmetry of optic nerve head (ONH) parameters in healthy eyes is essential in determining the accuracy of such signs. Using high-definition spectral-domain optical coherence tomography (OCT), a recent study reported a marginally significant difference in average peripapillary retinal nerve fiber layer (RNFL) thickness between 2 eyes (0.52 mum, P = .049) in healthy eyes, and suggested that an asymmetry of 9 [xm could indicate early glaucoma damage.