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Doctor insights on: Occasional Pupil Dilation

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What's pupil dilation?

What's pupil dilation?

Pupil dilation: When you look at your eye is the mirror, the dark circle in the center is the pupil. Dilating drops make the pupil larger and allow a more complete eye exam robe performed. Dilation takes about 15-20 minutes and lasts 3-4 hours or longer (depending on which drops are used). ...Read more

Pupil (Definition)

The pupil is the opening in the iris inside of the eye though which light is focused on the retinal film at the back of the eye. The iris can open and close in response to light to vary the amount inside the eye. It is what looks red, in the ...Read more


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Is it bad to have pupil dilation?

Is it bad to have pupil dilation?

Not always: If you are referring to having your eyes dilated with drops in the ophthalmologist's office, this is generally safe, except when you have "narrow angles." this can be determined by your eye md. If your pupil spontaneously dilates, this can be a sign of a problem in the brain (tumor, aneurysm, etc) and should be evaluated right away by an ophthalmologist. ...Read more

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How long can pupil dilation last after an exam?

A few hours: Typical dilation usually lasts between 4 and 6 hours. When a chile is dilated, it may last a few hours longer. If dilation lasts more than 24 hours, you should contact your eye doctor. ...Read more

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How long does it take for pupil dilation to end?

4 hours: Usually, around 4 hours, however in eyes that are lighter in color, blue, two-toned, or green the effect of the drops can last beyond 4 hours. In small children, although rare, the effect can last up to a week or more. ...Read more

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I have uneven pupil dilation. Is this harmful or harmless?

I have uneven pupil dilation. Is this harmful or harmless?

See an eye doctor: It can be normal, especially if it has always been present. There are certain conditions that can lead to one pupil dilating more (or less) than the other. If the pupil difference is new, it should be evaluated by an eye doctor soon. The condition itself is usually harmless, but the underlying cause needs to be addressed. ...Read more

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Does alcohol cause pupil dilation?

Does alcohol cause pupil dilation?

Usually constriction: Alcohol in large amounts can cause pupillary constriction. That being said, it is not the best indicator of alcohol use/intoxication. Like benzodiazepines and opioids, alcohol is a depressant, promoting parasympathetic activity and pupil constriction. ...Read more

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Does insomnia cause pupil dilation?

Does insomnia cause pupil dilation?

Not usually: Dilated pupils can occur as a side effect of various medications and several illicit drugs. Serious medical conditions such as serotonin syndrome can also cause this. Insomnia for a night or two would not usually result in dilated pupils. How long have you had insomnia? Have you been depressed or started a new medication? See your doctor to be sure and bring a list of all drugs, herbals takin ...Read more

Dr. Hirenkumar Italia
69 doctors shared insights

Mydriasis (Definition)

Mydriasis is the process of dilating the ...Read more