Miosis definition is excessive smallness or contraction of the pupil of the eye. Longterm management of iris flocculi and miosis jama. Media in category miosis the following 2 files are in this category, out of 2 total. Normally, as part of the pupillary light reflex, the pupil dilates in the dark and constricts in. Miosis means excessive constriction shrinking of your pupil. Miosis simply means a constriction of the eyes pupil. Opioids depressants such as codeine, fentanyl, morphine, heroin and. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
The condition may be unilateral or bilateral and sporadic or hereditary. The opposite condition, mydriasis, is the dilation of the pupil. As nouns the difference between mydriasis and miosis is that mydriasis is medicine the condition of having abnormally large and dilated pupils due to disease or drugs, particularly stimulants such as methamphetamines, cocaine, etc while miosis is contraction of the pupil of the eye. Anisocoria is the condition of one pupil being more dilated than the other. Causes, treatment, and diagnosis of constricted pupils. Primary pigmented epithelial iris cysts of the pupillary margin, or iris flocculi, are usually asymptomatic but can obstruct the pupil and decrease vision. The term is from ancient greek, muein, to close the eyes. In miosis, the diameter of the pupil is less than 2 millimeters mm, or just over 116th of an inch. Miosis is a persistent constriction of the pupil due to excessive constriction of the sphincter muscle of the iris, or paralysis of the dilator pupillae muscle.
Miosis is not to be confused with meiosis, which is a type of cell division. Miosis or myosis is excessive constriction of the pupil. These were related to a strong family history of thoracic aortic aneurysms and aortic dissections taad associated with a. Stormorken syndrome is an autosomal dominant disorder characterized by mild bleeding tendency due to platelet dysfunction, thrombocytopenia, anemia, asplenia, tubular aggregate myopathy, congenital miosis, and ichthyosis.
Midriasis significa pupilas dilatadas, es decir, grandes. By itself, unilateral miosis one eye only is quite a bit less common. I examined the third, the sister ingeborg, this year, 1942. The pupil constricts in bright light exposure to prevent and protect the eye from the aberration of light ray and attain an expected acuity in bright environment. Congenital miosis can also occur secondary to contracture of fibrous material on the pupil margin from remnants of the tunica vasculosa lentis or neural crest cell anomalies. On the right nostril, 3 to 4 drops of 0,025 % oxymeta. Miosis definition of miosis by the free dictionary. In mydriasis, the diameter of the pupil in dilation is 4mm or more while in miosis, the diameter of pupil in constriction is 2mm or less. Nonphysiological causes of mydriasis include disease, trauma, or the use of drugs. Data sources include ibm watson micromedex updated 10 apr 2020, cerner multum updated 6 apr 2020, wolters kluwer updated. Congenital miosis american academy of ophthalmology. Unilateral mydriasis after anesthesia as per request of the dentist, a nasotracheal intubation was planned.