miosis


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Related to miosis: meiosis, Horner's syndrome

mi·o·sis

also my·o·sis (mī-ō′sĭs)
n. pl. mi·o·ses (-sēz) also my·o·ses
Constriction of the pupil of the eye, resulting from a normal response to an increase in light or caused by certain drugs or pathological conditions.

[Greek mūein, to close the eyes + -osis.]

miosis

(maɪˈəʊsɪs) or

myosis

n, pl -ses (-siːz)
1. (Pathology) excessive contraction of the pupil of the eye, as in response to drugs
2. (Biology) a variant spelling of meiosis1
[C20: from Greek muein to shut the eyes + -osis]
miotic, myotic adj, n

mi•o•sis

or my•o•sis

(maɪˈoʊ sɪs)

n.
excessive constriction of the pupil of the eye.
Compare mydriasis.
[1810–20; variant of myosis < Greek mý(ein) to shut (the eyes) + -osis]

miosis, myosis

abnormal constriction of the pupil of the eye, caused by drugs or illness. Cf. mydriasis. — miotic, myotic, adj.
See also: Eyes
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.miosis - (genetics) cell division that produces reproductive cells in sexually reproducing organismsmiosis - (genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)
genetic science, genetics - the branch of biology that studies heredity and variation in organisms
anaphase - the stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
cell division, cellular division - the process in reproduction and growth by which a cell divides to form daughter cells
cytokinesis - organic process consisting of the division of the cytoplasm of a cell following karyokinesis bringing about the separation into two daughter cells
karyokinesis - organic process consisting of the division of the nucleus of a cell during mitosis or meiosis
metaphase - the second stage of meiosis
nondisjunction - meiosis in which there is a failure of paired homologous chromosomes to separate; results in an abnormal number of chromosomes in the daughter cells
prophase - the first stage of meiosis
segregation - (genetics) the separation of paired alleles during meiosis so that members of each pair of alleles appear in different gametes
telophase - the final stage of meiosis when the chromosomes move toward opposite ends of the nuclear spindle
2.miosis - reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smallermiosis - reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
Translations

mi·o·sis

n. miosis, contracción excesiva de la pupila.
References in periodicals archive ?
Inflammatory involvement of the sympathetic nerves passing through the interior of the cavernous sinus may produce Horner syndrome with miosis.
This effect may indicate ([beta]-adrenergic inhibition or [alpha]-adrenergic activation of the iris sphincter muscle which may result in miosis (SMITH et al.
He also said that reports have also indicated that the presentation of symptoms after the attack included respiratory problem, vomiting, fainting and foaming at the mouth, as well as miosis (pupillary constriction).
Other ocular findings includes glaucoma secondary to aphakia, abnormally flat cornea, increased axial length of the globe, hypoplastic iris, orciliary muscle responsible for decreased miosis, and an increased risk of retinal detachment (11).
Inhibition of surgically induced miosis and prevention of postoperative macular edema with nepafenac.
When the object for fixation was held closer than 30 cm to examine the eye movements, the patient developed convergence and miosis was noted to occur synergistically.
With ocular exposure, the onset of lacrimation, irritation, pruritis, burning, blepharospasm, and possible miosis occurs within 4 to 12 hours.
Ocular effects of prostaglandins include increased or decreased intraocular pressure (IOP), local vasodilation and increased permeability of the blood-aqueous barrier and miosis.
Muscarinic symptoms such as nausea, vomiting, diarrhea, sweating, salivation, urination, stool incontinence, lacrimation, miosis, and bradycardia and nicotinic signs such as mascular weakness, fasciculation, paralysis, convulsion, and coma are found.
Ophthalmic examination revealed distorted cornea with focal corneal oedema and fibrin clot at site of laceration, shallow anterior chamber with hyphema, miosis and dyscoria.