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Doctor insights on: Causes Of Pinpoint Pupils

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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 can cause off-center pupils?

Interesting question: This may be caused by an intracranial lesion. This symptom warrants an exam with an ophthalmologist. If you do not know of one have your primary care physician refer you to one. ...Read more

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What causes small pupils?

Many causes: Without more information, the most inclusive answer is numerous medical conditions, prescription and non-prescription medications, and/or illicit substances. Some of these conditions and/or medications/substances can be harmful/lethal without medical attention. ...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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What would cause the pupil to be constricted all of the time?

Many things: Pupillary asymmetry needs evaluation. Many issues can make a pupil smaller or make the fellow pupil larger, resulting in asymmetry. See an eye doctor for further evaluation. ...Read more

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What could cause my left pupil to spasm in reaction to direct light?

What could cause my left pupil to spasm in reaction to direct light?

Spasm: Could be iritis-- inflammation of the iris can cause light sensitivity and pupil spasm-- this can be quite uncomfortable. Seek help with your local eye doctor... ...Read more

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What conditions would cause sudden onset and persistent bilateral medial corectopia in a person with previously centered pupils?

What conditions would cause sudden onset and persistent bilateral medial corectopia in a person with previously centered pupils?

Several things..: If it is in fact corectopia, and not esotropia or pseudoesotropia, then the causes include progressive iris atrophy and other rare developmental anomalies, as well as post-traumatic scarring. None of these are likely to cause sudden onset of corectopia, though. Since these conditions can sometimes cause glaucoma, it would be best if an eye md (ophthalmologist) examined you. ...Read more

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What can cause unequal pupil size? It is not very much bigger than the other one and it contracts fast to light. And should I worry?

Check photos: To see if has always been there. If yes, it is likely physiologic anisocoria which is fine. If this is a new change - than get checked. ...Read more

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Could stress cause unequal pupil sizes?

Well...: If you already had unequal pupil sizes (anisocoria) ; the pupils dilated under stress- it could become more apparent. ...Read more

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Does anxiety cause changes in pupil size?

Does anxiety cause changes in pupil size?

It can: The diameter of the pupil tends to enlarge in response to fear. In fact some scientists are using technology to measure pupillary response in studies of fear. The pupils will also change diameter in response to changes in the body, such as the introduction of various drugs. ...Read more

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Could unequal pupils be caused by stress?

Could unequal pupils be caused by stress?

Not - BUT: Anisocoria (unequal pupil size) is likely to be much more easily picked up with dilated pupils. Anxiety/ stress can cause pupils to dilate. ...Read more

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What causes your pupils to be small when on opiates?

Constriction: The "pathway" leading to constriction of the circular sphincter pupillae muscle starts at a nucleus near the 3rd cranial nerve, connects inside the ciliary ganglion, and ends in the inner muscle surrounding the iris. Opiates increase parasympathetic outflow and, therefore, may produce ciliary muscle constriction. ...Read more

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Can retinopathy cause one pupil being smaller than the other?

Can retinopathy cause one pupil being smaller than the other?

What kind: Diabetic tend to have a smaller pupil. What kind of retinopathy do you mean? If the person develops unequal pupil then he/she needs to consult an ophthalmologist asap. ...Read more

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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 the medication, namenda, (memantine) cause constricted pupils?

Probably not: This is not one of the listed side effects. However, if you began having this problem when you started the medication, contact your doctor and discuss this with him/her. ...Read more

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One of my pupils is dilated to almost twice the size of the other. What can cause this?

One of my pupils is dilated to almost twice the size of the other. What can cause this?

Anisocoria: Anisocoria refers to unequal pupils.
Physiologic anisocoria is very common and normal in up to 20% of people. The variation should be no more than 1mm and both eyes should react normally to light.
It can be dangerous if it is a form of horner's syndrome (e.g. Carotid dissection) or from damage to the third nerve (e.g. Aneurysmal expansion) so you should get it checked out! ...Read more

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Why is it that my pupil is natrually since I was a kid always very enlarged and can that cause headaches?

More info: There are medical conditions where one pupil or both pupils are dilated.
It might be an isolated problem or one manifestation of a different disorder.
Also:
does your eye react to light?
Do you have any associated symptoms?
Might need further w/u and investigation.
Seeing your md would guide your next step. ...Read more

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What are possible causes of one pupil being dialated more than the other one if not due to lighting or any known injury?

Anisocoria: Anisocoria is a condition characterized by an unequal size of the eye's pupils. Anisocoria is defined by a difference of 0.4 mm or more between eye's pupilsaffecting 20% of population, it can be an entirely harmless condition or a symptom of more serious medical problems. If this is recent observation should consult ophthalmologist. ...Read more

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Why do ssri's cause pupil dialation?

Serotonin effect: Ssris increase serotonin levels in nerves throughout the body, including the eye. Excess serotonin acting on the 5-ht7 and 5-ht2a/2c receptors in the eye produce relaxation of the pupil and passive dilation. This effect is countered by the 5-ht1a receptor which contracts the muscle. However, when both receptors are simultaneously stimulated, the predominant effect is mydriasis (dilation). ...Read more

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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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What causes pupils to be too large for lasik surgery?

Youth: Young patients have big pupils. Old people have small pupils. Pupil size is less of an issue today than it was 10 years ago as current treatments accommodate larger pupil sizes. Unless your pupils are gigantic, you will likely do well with modern lasik equipment. ...Read more

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Has Zoloft (sertraline) been known to cause constricted pupils?

No: This is not one of the listed side effects. However, each person's chemistry is unique. It is possible to have any side effect to a medication. ...Read more

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Unequal pupils, is it caused by concussion or are they related at all?

Unequal pupils, is it caused by concussion or are they related at all?

Can be normal: About 20% of people have unequal pupils with no underlying cause. ...Read more

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Why do serotonin-affecting (serotonergic) drugs cause pupils to enlarge?

Norepinephrine: Serotonin has no effect on pupil size.

On the other hand, many serotonin-affecting antidepressants also inhibit the repuptake of norepinephrine (NE), causing NE levels in the extracellular space to increase. When NE levels rise, the iris muscle is stimulated to contract, thus causing pupils to appear large.

Some AD meds also block acetycholine, and that can cause dilated pupils also. ...Read more

Dr. Alan Ali Dr. Ali
1 doctor agreed:
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Can you please explain why serotonin effecting (serotonergic) drugs cause pupils to get so huge?

Dr. Alan Ali Dr. Ali
1 doctor agreed:

Serotonin & Mydriasi: Ssris inhibit the reuptake of serotonin, leading to excess serotonin present, which stimulates the sympathetic nerves supplying the iris muscles in the eyes, causing the pupils to dilate. ...Read more

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What would cause unequal pupils in a patient that has been in a medically induced coma for over a week?

Depends: It is important to know if this had been true prior to the illness onset. If not present prior the possibility is high the pt has had some intracranial catastrophe such as brain bleed. The unequal pupils suggest a bleed or other intracranial event. Need to speak to the neurologist. If not under the care of neuro get a consult. ...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