A Practical Guide for Interpretation of Optical Coherence Tomography Retinal Nerve Fiber Layer Measurement

Abstract

Structural damage in glaucoma often occurs before detectable loss in visual function.1-3 Accurate assessment of the optic disk and retinal nerve fiber layer (RNFL) morphology, however, is not always an easy task. Optical coherence tomograph (OCT), confocal scanning laser ophthalmoscope (CSLO) and scanning laser polarimeter (SLP) are the 3 commonly used imaging instruments for objective measurement of the optic disk and RNFL in clinical and research settings. While SLP only measures the RNFL and CSLO primarily measures the optic disk, OCT provides cross-sectional imaging for both the RNFL and optic disk