ONH
Optic Nerve Head
Plain-language definition
The visible portion of the optic nerve inside the eye where nerve fibers exit to carry visual signals to the brain. Also called the optic disc.
- Category
- Anatomy
- Also written as
- No alternate forms listed.
Anatomy terms name the eye, orbit, optic nerve, retina, or visual pathway structures that may appear in an exam note or imaging report.
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.