miosis


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Related to miosis: meiosis, Horner's syndrome

miosis

 [mi-o´sis]
excessive contraction of the pupil.

mi·o·sis

(mī-ō'sis), Do not confuse this word with meiosis.
1. Contraction of the pupil.
2. Incorrect alternative spelling for meiosis.
[G. meiōsis, a lessening]

miosis

/mi·o·sis/ (mi-o´sis) contraction of the pupil.

miosis

also

myosis

(mī-ō′sĭs)
n. pl. mio·ses (-sēz)
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.

miosis

[mī·ō′sis]
Etymology: Gk, meiosis, becoming less
1 contraction of the sphincter muscle of the iris, causing the pupil to become smaller. Certain drugs and stimulation of the pupillary light reflex result in miosis.
2 an abnormal condition characterized by excessive constriction of the sphincter muscle of the iris, resulting in pinpoint pupils. Compare mydriasis.

miosis

Contraction of the pupil.

miosis

Contraction of the pupil. Cf Mydriasis.

mi·o·sis

(mī-ō'sis)
1. Contraction of the pupil.
2. Incorrect alternative spelling for meiosis.
[G. meiōsis, a lessening]

miosis

Constriction of the pupil.

miosis (mī·ōˑ·sis),

n an ocular condition characterized by excessive constriction of the sphincter muscles of the iris; results in small pupils; stimulation of the pupillary reflex by an increase in light and certain drugs may result in temporary miosis.

miosis

Contraction of the pupil or condition in which the pupil is very small (2 mm or less in diameter). It can be brought about by a spasm of the sphincter muscle or by the effect of a miotic drug (e.g. eserine, neostigmine, pilocarpine), or in certain spinal diseases or any stimulation of the parasympathetic supply to the eye. Miosis occurs naturally when doing close work or when stimulated by light. Note: also spelt myosis. See corneal reflex; pupil light reflex; baring of the blind spot; Horner's syndrome.

mi·o·sis

(mī-ō'sis)
Contraction of the pupil.
[G. meiōsis, a lessening]

miosis

(mīō´sis),
n 1. the contraction of the sphincter muscle of the iris, causing the pupil to become smaller.
n 2. an abnormal condition characterized by excessive constriction of the sphincter muscle of the iris, resulting in very small, pinpoint pupils.

miosis, myosis

excessive contraction of the pupil.
References in periodicals archive ?
En ninos es frecuente la letargia, coma, convulsiones, debilidad muscular flacida, miosis, taquicardia y salivacion excesiva (23).
Miosis after laser procedure is an important factor that makes surgery more difficult.
La via aferente del reflejo pupilar es comun a la miosis y midriasis, se origina en celulas de la retina (neuronas ganglionares) cuyos axones llegan al "centro pupilar" en el tronco del encefalo, en la zona pretectal de Ransom.
Miosis (small pupils) is pathognomonic for opioid drug administration and is a consequence of effects on the sympathetic nervous system.
Naloxone eye drops reverse the miosis in runners--implications for an endogenous opiate lest.
Toxicity cases present with miosis, hypotension, bradycardia, and respiratory and central nervous system depression, mimicking narcotic overdose.
Los primeros sintomas suelen ser muscarinicos: miosis, vision borrosa, sudacion, hipersecrecion bronquial, broncoespasmo, bradicardia, bloqueo AV, aumento del peristaltismo intestinal.
Miosis Reactivas a la luz Lesion a nivel del diencefalo, trastornos metabolicos, drogas como la heroina, barbituricos, pilocarpina.
At least two of the following: At least one of the following is Bilateral location present ipsilateral to the pain: Pressing/tightening Conjunctival injection and/or (nonpulsating) quality lacrimation Mild or moderate intensity Nasal congestion and/or Not aggravated by routine rhinorrhea physical activity Eyelid edema Forehead and facial sweating Miosis and/or ptosis And both of the following: Attacks have a frequency from No nausea or vomiting once every other day to eight No more than one of photophobia times a day.
Signs included ataxia in all cases (7/7), weak hindlimbs and/or forelimbs and paresis (4/7), complete paralysis (2/7), seizures (2/7), chewing (1/7), partial blindness (2/7), jaundice and/or hepatitis (2/7), and miosis of the pupils (1/7).
Sympathetic blockade associated with Horner's Syndrome (ptosis, miosis, anhydrosis) * Inadequate analgesia (especially shoulder tip pain secondary to diaphragmatic irritation) Unexpected--potential to be serious.