Discussions By Condition: Medical Stories

one pupil widely dilated

Posted In: Medical Stories 13 Replies
  • Posted By: Anonymous
  • September 15, 2007
  • 00:28 AM

I woke up one morning with one pupil widely dilated. No pain, no headache. I did have a lot of pressure in my head and neck. GP sent me to an opthalmologist who found nothing wrong with my eyes and did not have any idea what could be causing it. Said I must have somehow gotten a chemical in my eye without realizing it. My GP didn't buy that because I had no redness, watering, pain in the eye, or recollection of using chemicals. After a day it started going back to normal.

Next day the same thing, same pupil widely dilated. I had a CT scan which was normal, but still had eye problem. Had an MRI. the result? Huge inflammation of my sphenoid sinus, which was pressing on my brain and eye. I'm so relieved!

The reason I posted is because all my internet searches were not turning up anything on ONE pupil dilated unless it was something horrible like aneurysm, stroke, tumor. Searches on sinusitis show all kinds of symptoms that I do NOT have - no headache, cold, runny nose, eye swelling, facial sensitivity, etc. They do not mention pupil dilation as a symptom. Also, all the sites say a CT scan will diagnose sinusitis, but it did NOT in my case.

My hope is this might help someone else who cannot find the reason for a single pupil to be dilated, and maybe a CT scan did not show anything. Apparently this is really uncommon.

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13 Replies:

  • I think i have this exact thing ! what did ur doctor give u as treatment that cleared it up?
    Anonymous 42789 Replies
    • February 23, 2009
    • 05:40 PM
    • 1
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  • can I just say THANK YOU! I'm sitting here googling all of this and I'm not finding anything that doesn't make me want to run to the ER right now. Thank you for posting this.
    Anonymous 42789 Replies Flag this Response
  • I experienced this same problem a few years back, while I was taking Prozac for depression. Single eye dialation is one of the very rare side effects of these type of drugs! Only about 2% of patients taking anti-depressents ever experience it. So if you are, or have recently been taking an anti-depressent, that's probably the cause. The symptoms will go away when you stop taking the meds, although in my case, there remains a slight dialation of my right pupil to this day. Eye doctor says no worries about it, and i'm the only one to notice it, so I live with it! Hope this helps!! :-)
    Anonymous 42789 Replies Flag this Response
  • this happened to me last night and it turns out the antihistamine in my allergy eye drops concentrated under my contact and did it.
    Anonymous 42789 Replies
    • August 22, 2009
    • 09:29 PM
    • 0
    Flag this Response
  • I think i have this exact thing ! what did ur doctor give u as treatment that cleared it up?Did you have anything done for this? I'm wondering if I have the same thing, although it seems like instead of one eye being dilated, it's more the opposite, where my one eye doesn't seem to be dilating as much as the other and the eyelid seems kind of droopy. The affected eye seems closed more. How was yours diagnosed?
    Anonymous 42789 Replies
    • September 8, 2009
    • 00:33 AM
    • 0
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  • thank you so much i am recently going through the same thing and they did a c.a.t. but no m.r.i. I have recently had a cold about three weeks so this would explain it! thanks so much!I woke up one morning with one pupil widely dilated. No pain, no headache. I did have a lot of pressure in my head and neck. GP sent me to an opthalmologist who found nothing wrong with my eyes and did not have any idea what could be causing it. Said I must have somehow gotten a chemical in my eye without realizing it. My GP didn't buy that because I had no redness, watering, pain in the eye, or recollection of using chemicals. After a day it started going back to normal. Next day the same thing, same pupil widely dilated. I had a CT scan which was normal, but still had eye problem. Had an MRI. the result? Huge inflammation of my sphenoid sinus, which was pressing on my brain and eye. I'm so relieved! The reason I posted is because all my internet searches were not turning up anything on ONE pupil dilated unless it was something horrible like aneurysm, stroke, tumor. Searches on sinusitis show all kinds of symptoms that I do NOT have - no headache, cold, runny nose, eye swelling, facial sensitivity, etc. They do not mention pupil dilation as a symptom. Also, all the sites say a CT scan will diagnose sinusitis, but it did NOT in my case.My hope is this might help someone else who cannot find the reason for a single pupil to be dilated, and maybe a CT scan did not show anything. Apparently this is really uncommon.
    Anonymous 42789 Replies Flag this Response
  • Thank you for the information. A co-worker and I have just both experienced problems with one eye dilating. It usually lasts a half hour or so and goes back to normal. Neither one of us had any trauma, headache, neck pain or anything physical. My friend having developed the problem first did all tests: ct scan, mri, opthomologist and nothing was found. We work on a school campus that has lots of trees and foliage and this time of year there is a ton of pollen and particles blowing around. I would bet that this may be a contributor of our eye dilation. I bought Visine-A for my eyes one week ago because they were itching and watering. It was soon after I started using this product that my eye dilated. Turns out there is some chemical in Visine to remove the red but it can cause other problems in the eye such as dilation. I was told to get rid of it immediately and not use it anymore. I was told to use Systane for minor eye irritation such as itching, watering, dry-eye, etc.Hopefully this helps someone with a similar concern.
    Anonymous 42789 Replies Flag this Response
  • this happened to me last night and it turns out the antihistamine in my allergy eye drops concentrated under my contact and did it.This sounds like what happened to me today. I have allergies and wasnt supposed to use the drops with my contacts (oops) and my pupil dilated. Im going to the optom. soon anyway but this kind of relieves me a bit.
    Anonymous 42789 Replies Flag this Response
  • Did you have anything done for this? I'm wondering if I have the same thing, although it seems like instead of one eye being dilated, it's more the opposite, where my one eye doesn't seem to be dilating as much as the other and the eyelid seems kind of droopy. The affected eye seems closed more. How was yours diagnosed?Sounds as though yours is more of a thyroid problem, I had the same thing.
    Anonymous 42789 Replies Flag this Response
  • they eye that remains dilated is also droopy. They diagnosed it as adies tonic pupil but I don't see anything in adies that causes eye pain or droopiness.
    Anonymous 42789 Replies Flag this Response
  • this happened to me last night and it turns out the antihistamine in my allergy eye drops concentrated under my contact and did it.Thank you for this info! It explains exactly what I am experiencing and saves me a trip to the ER! Whew!
    Anonymous 42789 Replies
    • August 16, 2011
    • 06:23 AM
    • 0
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  • Thanks for information. I'm experiencing same things for months. One pupil has been dilated for months. But in my case Brain MRI and other tests indluding VEP test and CT angiography of brain vessels show nothing involving situation. Doctors didn't know the cause yet. I'm working with computer most of the time in my office. I suspect that it may be a seasonal allergy. May be it relates to my work that is mental work, most of the time. I have been examined by a neurologist and two oculists. I don't know what else can I do.
    Anonymous 42789 Replies Flag this Response
  • hi im a 44 year old and i went to the clevland clinic in ohio today and they told me that i had 80,s pupil. my left eye is dialated. i have been to every type of dr. u can think of. the dr told me this is normal for women of my age. I personally dont know of anyone else that i have met that has this but they told me that the dialation will go down and my eye will stay that way and never dialate again. they also said that 2% of thwe women have the other eye do the same. its not life threatining and i amd a spray painter for general electric and my eyes are very important to me. i will see if they are right but ive had 2 drs say the same thing:(
    chrissy77 1 Replies
    • September 18, 2012
    • 00:45 AM
    • 0
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