OCT
Pronunciation: OH-see-tee
Also written as: OCT — optical coherence tomography
Optical coherence tomography, a non-invasive imaging technique that provides cross-sectional views of retinal and optic nerve structures.
Full Definition
Optical coherence tomography (OCT) is a high-resolution imaging modality that uses light waves to create detailed cross-sectional images of the retina and optic nerve. In neuro-ophthalmology, OCT is particularly valuable for detecting and monitoring optic nerve disorders, measuring retinal nerve fiber layer thickness, and assessing macular changes. The technology can detect subtle structural changes before functional visual defects become apparent, making it crucial for early diagnosis and progression monitoring of conditions like glaucoma, optic neuritis, and papilledema.
Usage
Usage note: Spell out on first use in formal reports; commonly abbreviated in subsequent references.
In Context
- "OCT revealed significant thinning of the retinal nerve fiber layer in both eyes." — Diagnostic imaging report
- "Follow-up OCT demonstrated resolution of optic disc swelling following treatment." — Progress note