Miosis

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Miosis

Miosis (pronounced: my-OH-sis, from the Greek mios, meaning "small") is a term used in medicine to describe the constriction of the pupil of the eye. It is the opposite of mydriasis, which refers to the dilation of the pupil.

Causes

Miosis can be caused by a variety of factors, including exposure to bright light, use of certain drugs such as opioids, and diseases of the nervous system such as Horner's syndrome. It can also be a normal response to accommodation, which is the process by which the eye adjusts to focus on near objects.

Symptoms

Symptoms of miosis can include reduced vision in dim light and difficulty focusing on distant objects. In severe cases, it can lead to blindness.

Treatment

Treatment for miosis depends on the underlying cause. If it is caused by a disease or condition, treating that condition may help to alleviate the symptoms. In some cases, eye drops that dilate the pupil may be used.

Related Terms

External links

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