OCT
Optical Coherence Tomography
Plain-language definition
A non-invasive imaging test using light waves to take cross-section pictures of the retina and optic nerve, detecting thinning, swelling, and structural changes.
Read our full article on OCT (Optical Coherence Tomography).
Where this term comes up
“OCT angiography (OCTA) is an advanced imaging technology that creates detailed maps of blood vessels in the retina and optic nerve head without needing injected dye.”
Test · OCT Angiography (OCTA)
“An optical coherence tomography (OCT) report uses cross-section images, color-coded thickness maps, numbered grids, and progression graphs to show the retina and optic nerve.”
Guide · How to Read Your OCT Report
“OCT measures the swelling and helps guide treatment.”
Condition · Macular Edema
- Category
- Test or diagnostic term
- Also written as
- No alternate forms listed.
Diagnostic terms describe tests, measurements, imaging, or exam techniques used to understand eye and neuro-ophthalmic problems.
Related glossary terms
- macula
Central Retina
- MRI
Magnetic Resonance Imaging
- fundus
Back of the Eye
- ischemia
Reduced Blood Supply
- hemorrhage
Bleeding
- bilaterally
On Both Sides
A note on medical context
A glossary definition can explain a word, but it cannot tell you whether a symptom or test result is serious. If this term came from an article, use the full article and your clinician's guidance for context.