There's a program called InfantSEE that is run by the American Optometric Association, it's intended to get children in for their first eye appointment before they're 1 year old. The optometrists offer free appointments to kids under 1 - google InfantSEE and you can find doctors that participate. Since they want to see babies that early anyway, I think you shouldn't worry about seeing a specialist at all. If there is a problem, you'll want to start treating it early anyway - my daughter has had glasses since 14 months, and while it hasn't been easy, it's really not too bad (and they're super cute).
I am a new mom of a wonderful 5 month old daughter and am also an optometrist. The likelyhood of this being a normal variation is quite high. However, as others have mentioned there are also occassions were it is a sign/symptom of a larger problem. I would encourage you to seek out an InfantSEE provider near your home to have your son evaluated. This provider will be an optometrist who has special interests in seeing children, also the screening program is free of charge. If a problem is detected your son will be referred for further evaluations as necessary.
I hope this helps.
Jessica M.
My sons dr. just mentioned this and he is 8 yrs. old. I have never noticed it. He said that it is normal and just to let schools or sports teams know in case something happens they won't mistake this as something else.
Hello. I’m not a mom or anything but I am a child. I am 18 years old and a female. I have the same problem as your son and I just wanted to reassure you. Mine only happens in low light or when I am really upset as well. My left eye is the one that is always bigger as well. And it is a very minimal difference. However, the only thing I can say that is different from me and other people with the same size is I don’t cry out of my left eye. my eye sight is 20-20 at 18 years old and I have always had this since I was born. My mom too was nervous but now that I am older and she knows that all it affects is my crying she isn’t anymore. For your son, I would say he will be okay. No specialist is needed. (=