Optical Coherence Tomography in Optic Nerve Disorders
Optical coherence tomography (OCT) is an evolving technology that provides noninvasive imaging of tissues. It uses low coherence interferometry to produce cross-sectional images based on the optical scattering of light, 1 similar to ultrasound. Since its introduction into the ophthalmology clinic in the 1990s, optical coherence tomography has become a standard tool for the evaluation of ophthalmic disease. Although its main use was initially for retinal disease and glaucoma, OCT now has a niche in neuro-ophthalmic evaluation. It is mainly useful to rule in occult retinal disease when the etiology of visual loss is unclear, but it is also used to evaluate and follow up abnormalities of the retinal nerve fiber layer (RNFL), such as optic nerve edema and atrophy.2
KeywordsOptic Nerve Optical Coherence Tomography Retinal Nerve Fiber Layer Retinal Nerve Fiber Layer Thickness Peripapillary Retinal Nerve Fiber Layer
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