mydriasis
Dilated / Large Pupil
Plain-language definition
Abnormal dilation of the pupil. A fixed, dilated pupil can indicate a third nerve palsy, trauma, or pharmacologic dilation.
Where this term comes up
“Atropine is an anticholinergic (parasympatholytic) eye drop that dilates the pupil (mydriasis) and temporarily paralyzes the eye's focusing muscle (cycloplegia).”
Medication · Atropine Eye Drops
- Category
- Condition, finding, or disease process
- Also written as
- No alternate forms listed.
Pathology terms describe diseases, tissue changes, exam findings, or complications that can affect vision or eye comfort.
Related glossary terms
- amblyopia
Lazy Eye
- anticholinergic
Acetylcholine-Blocking
- ciliary
Ciliary Body-Related
- cycloplegia
Focusing Muscle Paralysis
- punctum
Tear Drain Opening
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.