miosis

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

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mi·o·sis or my·o·sis (m-ss)

n. pl. mi·o··ses (-sz)

1. The period of decline of a disease in which the intensity of the symptoms begins to diminish.

2. 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.

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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.

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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.

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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.

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miosis, myosis

excessive contraction of the pupil.

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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.

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miosis

Contraction of the pupil. Cf Mydriasis.