Miosis

Miosis
Other namesMyosis, pinpoint pupil
Miosis from bright light pointed directly at the eye. Pupil measured 2.3 mm in diameter
Pronunciation
  • /mˈsɪs/
SpecialtyOphthalmology 
SymptomsConstricted pupils

Miosis, or myosis (from Ancient Greek μύειν (múein) 'to close the eyes'), is excessive constriction of the pupil.[1][2][3][4] The opposite condition, mydriasis, is the dilation of the pupil. Anisocoria is the condition of one pupil being more dilated than the other.

  1. ^ Farlex medical dictionary citing:
  2. ^ Seidel HM, Ball JW, Dains JE, Benedict GW (2006-03-29). Mosby's Guide to Physical Examination. Mosby. ISBN 978-0-323-03573-6.
  3. ^ Farlex medical dictionary citing: Millodot: Dictionary of Optometry and Visual Science, 7th ed.
  4. ^ Farlex medical dictionary citing: Mosby's Medical Dictionary, 8th ed.