ACCOMMODATIVE ESOTROPIA.
he's most likely farsighted. i mean i obviously cannot diagnose that over the internet w/o seeing him, but that is the **CLASSIC** presentation of accommodative esotropia/farsightedness. he will most likely be Rx'd full-time-wear glasses.
i see these cases all day long in my pediatric practice, and i see them misdiagnosed & mismanaged all the time by health care professionals.
here's what happens in most significantly farsighted kids:
1) they "pass" all of their vision screens with 20/20 vision until age 3 or 4
2) they never complain about headaches or bad vision
3) then one day at age 3 or 4 they look up at you and one eye is turned "in" all of the sudden
again not having seen your grandson...by far the most likely scenario is that he needs glasses (not
strabismusBefore and after strabismus repair
Eye muscle repair
Strabismus surgery) for HYPEROPIA or "
farsightednessFarsightedness
Normal, near, and farsightedness". this is not a tumor or an aneurysm or anything serious or stressful or emergent. he does not need a "pediatric ophthalmologist"...pretty much any eye doc who sees kids routinely can do this.
good luck! hope you're not opposed to seeing your grandson in glasses from now on (if you are you could always have a pediatric contact lens fit...)