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Doctor insights on: What Are The Causes Of Dilation Of Pupils

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What are the causes of dilation of pupils?

What are the causes of dilation of pupils?

A few things: I assume you mean dilated and not responding to light. This can be caused by a number of drugs including scopolamine, atropine, most hallucinogens and many others. These should cause the pupils to be dilated equally (unless directly applied to one eye). If your pupils are not equal, then we start to get worried about problems like a head injury and you should seek immediate medical attention. ...Read more

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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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What are some common causes of spontaneous pupil dilation and dizziness? head MRI clean

What are some common causes of spontaneous pupil dilation and dizziness? head MRI clean

Pupils: Pupil dilation or mydriasis can occur with anything that will cause increased sympathetic tone or adrenalin. Nerves, excitement, fright, flight are all things that will dilate the eyes. Caffeine, decongestants eye drops can all dilate the eyes. ...Read more

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What is causing my right eye pupil dilation? I have been suffering from grand mal seizures, with severe headaches, right side only temple swelling, right eye pupil dilation, and also a sore right beside the afflicted eye.

What is causing my right eye pupil dilation? I have been suffering from grand mal seizures, with severe headaches, right side only temple swelling, right eye pupil dilation, and also a sore right beside the afflicted eye.

You : You should immediately make an appointment with an ophthalmologist and a neurologist. You don't say how long this has been going on, or whether your vision is affected, but there could be very serious problems. If this just started and you cannot get an appointment immediately, go to the emergency room. ...Read more

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What is a blue pill from korea that causes your pupils to dilate?

What is a blue pill from korea that causes your pupils to dilate?

?Pharmacist?: Maybe a pharmacist could help you to identify this. ...Read more

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Can hydrocodine/acetaminophen cause pupils to dilate?

Can hydrocodine/acetaminophen cause pupils to dilate?

No.: If anything, a sufficient dose of hydrocodone would cause the pupils to constrict (grow smaller). Acetaminophen has no effect on pupil size. ...Read more

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What drugs cause your pupils to dilate?

What drugs cause your pupils to dilate?

Dilation: Many drugs can cause pupil dilation. Some include cocaine, amphetamines, and MDMA. Additionally, some non-illicit/ recreational medications such as anticholinergics and antidepressents can cause dilation. ...Read more

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Please answer! what would cause your pupils to not dilate?

Pupils dilate and: constrict under control of cranial nerve 2 and 3. 2nd senses light and 3d adjusts pupil to control light input. No dilation = deficit in one or the other or a medication in the eye has poisoned muscle function. Would be very unlikely to inadvertently notice that both pupils do not dilate. Close eyes in bright room then open while friend observes. If they constrict they must have been dilated. ...Read more

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Why is it that hallucinogens such as lsd cause your pupils to dilate?

Pupil dilation: Hallucinogens like lsd are agonists of the serotonergic 5-ht2a receptors in the brain -- and in this way they can cause pupils to dilate. Serotonergic antidepressants can do this also. ...Read more

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Is there any evidence suggesting that consuming bilberry extract causes dilation of pupils, thus leading to increased night glares/starbursts?

Is there any evidence suggesting that consuming bilberry extract causes dilation of pupils, thus leading to increased night glares/starbursts?

No: No, there is absolutely no evidence that bilberry extract dilates pupils; if it did I have no doubt that this would be known. Agents that dilate pupils work via the autonomic nervous system and bilberry has no know effects on this (it can cause vasodilation but that is mediated by its effects on nitric oxide, which does not effect pupil dilation). ...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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Can lack of sleep cause my pupils to dilate?

Can lack of sleep cause my pupils to dilate?

Insomnia: Insomnia can cause a hyper arousable state with increased adrenaline which can cause pupillary dilation. ...Read more

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Would hypocalcemia cause pupil dilation in response to light?

Unlikely: Severe hypocalcemia may weaken muscle contraction, which could make the pupils unable to constrict. But it cannot cause a paradoxical dilation of the pupils to light. ...Read more

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Can Xanax (alprazolam) cause the pupils of the eyes to dilate?

Can Xanax (alprazolam) cause the pupils of the eyes to dilate?

Probably not: This is not one of the listed side effects of this medication. ...Read more

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Will Xanax (alprazolam) cause the pupils of the eyes to dilate?

Probably not: You may be thinking of some other drugs which dilate the pupils. Xanax (alprazolam) is a sedative and as such can give a signal to small automatic muscles to relax. But xanax (alprazolam) also happens to have a small adrenaline signal which works to constrict small muscles. In an overdose there would be more sedation than activation, possible dilated pupils and they may appear drunk. This is an life threatening emergency. ...Read more

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Could hypocalcemia cause pupil dilation and a sluggish pupil response to light?

Hypocalcemia: A complete list of the symptoms of hypocalcemia (h) can be found at this link: http://www.Clevelandclinicmeded.Com/medicalpubs/diseasemanagement/endocrinology/hypocalcemia/. Pupil dilation and and a sluggish pupil are not some of the symptoms of h. ...Read more

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Can sunglasses be bad for my eyes? Is it better to have darker-colored lenses or higher uv protection (or both)? I heard that darker sunglasses cause the pupil to dilate more, which makes your eyes more vulnerable to uv rays. Is this true? Should i get li

Can sunglasses be bad for my eyes? Is it better to have darker-colored lenses or higher uv protection (or both)? I heard that darker sunglasses cause the pupil to dilate more, which makes your eyes more vulnerable to uv rays. Is this true? Should i get li

Ultraviolet : Ultraviolet (uv) light is harmful to the eyes, especially large amounts over long periods of time. In the United States, all sunglasses are required to block a very large percentage of the uv rays. The darkness of the sunglasses does not affect the uv filtering ability, since uv light is invisible and the uv blockers are clear. It is true that darker the sunglasses will open the pupil more and thus let in more uv light, but since almost all of it is being filtered by the sunglasses, this is not something to worry about. The exception would be specific eye diseases such as retinitis pigmentosa, in which extra high uv protection is a good idea. ...Read more

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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