Pupils not the same size

My 3 month old daughter's pupils are different sizes. They are both dilating but the left pupil is always larger. When she is tired the left pupil is 3 times the size of the right. I know she can see me and follows me with her eyes when I leave the room. I also know she has not had any head trauma. Could she be blind in one eye?

[John C Hagan III, MD, FACS, FAAO]

Not likely that she's blind but that big of a difference in the size of the pupils is abnormal. Discuss it with your pediatrician, I would suggest you ask for a referral to a pediatric ophthalmologist. Be sure the ped Eye MD sees the child before any drops are put in the eye.

JCH III MD

[buj]

i used a few allergy eye drops, mixed with contact solution to store my contacts last night. a bit after i put them in this morning i noted that my left pupil was quite a bit larger than my right. i read that it is possible for the allergy drops to be the culprit, but could it also cause my vision to be very slightly hazey in that eye as well?

[John C Hagan III, MD, FACS, FAAO]

yes but it should go away in less than a couple of hours.

JCH MD

[colorist1]

This sounds like physiological Anisocoria (simple Anisocoria). 20% of people have this mild eye disorder. There is nothing to worry about if this is the only symptom. One eye lighter than the other or a droopy eye lid may be signs of something much more serious called Horners Syndrome. Of course you should get the opinion of a licensed eye doctor.

[John C Hagan III, MD, FACS, FAAO]

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