One Dialated Pupil

My daughter has the same thing- as long as it dilates with light- my doctor said it was fine- it is a genetic trait. My doctor's wife has the same trait. When my daughter was 3 mos it was more noticeable, but not much now, she is 8 mos now.

Hi there~
I hope I can ease your mind a little bit. My middle daughter is 7 and has always had one larger pupil, as do I. She has seen the pediatrician about this and an ophthalmologist as well and the same advice was given. As long as the pupil changes with light it is probably nothing. Of course check it out to be safe but rest easy as it is probably just how he was made. :)

Dear M.,

There are many things that can cause one pupil to be larger than
another. However, if this is something that is new, I recommend that you take your infant to an emergency room. If you have
a children's hospital nearby, that would be best as there
will be pediatric specialist on staff that can evaluate your
child. Due to the age of your child, he cannot really offer
complaints, so it is important to have this evaluated sooner
rather than later. If you have insurance that requires
some type of approval for emergency room visits let them know
that this is an acute change and due to your internet
research, you have learned that it is not advisable to wait
2 weeks for an evaluation. Stay calm, but move forward with
this evaluation. Good luck!

if she had bleeding or swelling of the brain she would already have shown other symptoms. this is not common but i have seen it often in the emergency room. i think you should just wait for the consult and then worry fi it is warranted

It very well could be iris coloboma of one eye....do you have any pictures of the eye you could send me.... both my girls have coloboma so I am fairly familiar...let me know if you have any questions
____@____.com

Dear M.,
Please Call your Doctor and validate that it is not to
be concerned or alarmed.
A difference in pupils is also a sign that your baby may have
a head injury. Please check today.

Warmly
C.

i JUST went through this with my daughter. i noticed it when she was about three months old (mainly i think b/c she was more alert and wide eyed.) anyway, it is called anasocoria (sp?) and there is nothing actually wrong with the eye or pupil. it happens in about 20% of the population. my daughter has super light blue eyes and so at first i noticed it all of the time, but now it is just a part of who she is. most people never even realize it unless i point it out. and i can barely even tell when it's bright light during the day or when it's pretty dark. the only time it's really noticeable is in dim light like in the evening.
but, i did the same thing you did. search the internet and drive yourself crazy thinking it's a brain tumor or a neurological problem. i can't say for sure until you see the doc, but it's actually more common than i realized. the eye doc that i first went to had the same thing. i just had never heard of it before.
oh, and i put my daughter in all different sorts of lights and both pupils reacted the same every time...the right one is just about 1mm bigger at all times then the left. why are they sending you to a neuro surgeon before first seeing a pediatric opthomologist? oh, and i just looked it up. it's spelled Anisocoria.
i also wanted to tell you that the eye doc just had me watch her eye for any type of drooping (of the eye and face.) we went to the initial appt and then a follow up six weeks later. during the six week checkup, he said he was confident nothing was wrong, b/c he definitely would have seen some changes in her face and eye. so, just keep watching him for any changes. the doc said if it was any type of tumor or growth, he would have seen it when they dialated my daughters eyes and that those types of tumors tend to grow fast. so, since he didn't see anything different at all in the six week check...she's fine. :)

HI M.,

I am an adult who has had different size pupils all my life.
I have very blue eyes but I have no idea if that has anything to do with it. I have worn glasses since the 5th grade. That's it. Nothing else wrong with me. I am glad that I was aware of my pupil size difference though because it was important to know once when I was in an accident. The paramedics looked at my pupils, checked them for dilation and constriction with a light. They were both responsive but it could have been indicative of another problem if pupil size difference wasn't normal for me. Seems like unless she's having some other symptoms it's not an emergency. Good luck.

Hi M.,

My son also had one pupil larger than the other at around three months. I looked on the internet and found all sorts of worst-case scenarios. Very scary. We went to a pediatric opthamologist and measured the diffence in pupil size along with a regular check up. His eyes were fine otherwise. He had a follow up appointment six months later and the pupils were much closer in size. He's just fine! I hear that slight diffentiation in size is not so uncommon.
I hope this helps your worry.