• Anisocoria is a condition characterized by an unequal size of the eyes' pupils. (wikipedia.org)
  • Anisocoria is a common condition, defined by a difference of 0.4 mm or more between the sizes of the pupils of the eyes. (wikipedia.org)
  • Anisocoria which is worsened (greater asymmetry between the pupils) in the dark suggests the small pupil (which should dilate in dark conditions) is the abnormal pupil and suggests Horner's syndrome or mechanical anisocoria. (wikipedia.org)
  • He was listed as second author on a paper published in The Journal of Neuroscience, which was featured briefly in episode 21 of the show named a show on May 25, 2012 called "My Pupils", explaining that his study of neuroscience of vision was motivated by his harmless anisocoria condition. (wikipedia.org)
  • Anisocoria is the medical term that simply means the pupils are not equal. (drshalupal.com)
  • An old photograph of the patient or the patient's driver's license should be examined (under magnification if possible) to see whether anisocoria (and ptosis, if applicable) was present previously. (msdmanuals.com)
  • Pharmacological agents with anticholinergic or sympathomimetic properties will cause anisocoria, particularly if instilled in one eye. (wikipedia.org)
  • A relative afferent pupillary defect (RAPD) also known as a Marcus Gunn pupil does not cause anisocoria. (wikipedia.org)
  • Even blindness in one eye does not cause anisocoria. (allnurses.com)
  • Horner's syndrome Mechanical anisocoria: Occasionally previous trauma, eye surgery, or inflammation (uveitis, angle closure glaucoma) can lead to adhesions between the iris and the lens. (wikipedia.org)
  • Anisocoria may also be caused by sight-threatening origins, such as angle closure glaucoma. (medscape.com)
  • Some of the causes of anisocoria are life-threatening, including Horner's syndrome (which may be due to carotid artery dissection) and oculomotor nerve palsy (due to a brain aneurysm, uncal herniation, or head trauma). (wikipedia.org)
  • In particular, sector palsy and anisocoria exceeding 1 mm (in the light) were seen much more commonly in Holmes-Adie patients than patients with generalised neuropathy. (nih.gov)
  • clinicians can diagnose the occasional serious occult disorder (eg, tumor, aneurysm) manifesting with anisocoria. (msdmanuals.com)
  • Anisocoria in the presence of confusion, decreased mental status, severe headache, or other neurological symptoms can forewarn a neurosurgical emergency. (wikipedia.org)
  • Discussion Anisocoria is a common physical finding caused by the mechanical imbalance of the iris dilator (sympathetic innervation causing dilation) and sphincter muscles (parasympathetic innervation causes miosis). (medworm.com)
  • The treatment of anisocoria depends entirely on the underlying cause of the condition, and specific treatment will be tailored specifically to the diagnosis. (lifelearn.com)
  • The causes of anisocoria are varied, and relate to alterations of the autonomic nervous system and/or the iris muscle. (medscape.com)
  • Clinically, it is important to establish whether anisocoria is more apparent in dim or bright light to clarify if the larger pupil or smaller pupil is the abnormal one. (wikipedia.org)
  • Anisocoria which is greater in bright light suggests the larger pupil (which should constrict in bright conditions) is the abnormal pupil. (wikipedia.org)
  • Anisocoria that is greater in dim light may be caused by a range of conditions. (aao.org)
  • Anisocoria is a frequent referral and chief complaint in the ophthalmology clinics at CHOP. (chop.edu)
  • Anisocoria is when blunt trauma to the head or eye area tears the pupil sphincter causing a permanent dilated pupil. (attorneysinmn.com)
  • Alkaloids present in plants of the genera Brugmansia and Datura, such as scopolamine, may also induce anisocoria. (wikipedia.org)
  • Anisocoria can initially present as retina damage or sudden vision loss, however the vision will usually return completely within 4-6 weeks so that the victim is left with the disfigured dilated pupil. (attorneysinmn.com)
  • Affecting up to 20% of the population, anisocoria is often entirely harmless, but can be a sign of more serious medical problems. (wikipedia.org)
  • If anisocoria occurs suddenly, you should consider this an emergency situation and seek veterinary care immediately to lessen the chance that your cat's vision will be permanently affected. (lifelearn.com)
  • The incidence and prevalence data for anisocoria vary by the specific pathophysiology and population. (medscape.com)