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miosis Syllabification: mi·o·sis
Pronunciation: /mīˈōsəs/
(also myosis)

Definition of miosis in English:


Excessive constriction of the pupil of the eye.
Example sentences
  • Symptoms include nasal congestion, ptosis of one eyelid, miosis, and conjunctional hyperemia.
  • Oral pilocarpine is contraindicated in patients with uncontrolled asthma and in patients in whom miosis is undesirable, such as patients with acute iritis or narrow angle (angle closure) glaucoma.
  • After inhalation of vapour, respiratory symptoms, dimming of vision, and miosis are generally the first clinical features to appear.


Pronunciation: /mīˈätik/
Example sentences
  • Its pharmacology accounts for its analgesic and antitussive properties, along with adverse effects such as respiratory depression, decreased bowel motility, miotic pupils, nausea and hypotension.
  • Since the pupillary sphincter is not receiving blood, neither light nor a miotic agent produces miosis.
  • Although topical miotic drops or gel preparations are poorly tolerated by younger patients due to induced myopia and accommodative spasm, pilocarpine Ocuserts are extremely well tolerated.


Early 19th century: from Greek muein 'shut the eyes' + -osis.

Definition of miosis in:
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