“Can my son's single eye squint be corrected through surgery?”

Depends on the diagnosis. A complete ophthalmologic exam should be performed.

It truly depends on the the underlying cause for squinting. In some children, this is a natural reflex due to poor vision in that eye. In some children, it is due to pain from light sensitivity and inflammation, while in others it is because the muscle is too weak to hold the eyelid up. Murray, it is caused by spasms of the muscles around the eye. There are multiple treatment options, but they all resolve around identifying the underlying cause and treating that first. My recommendation would be an evaluation with a pediatric ophthalmologist as your initial step. Hope that helps.

He should be seen by a pediatric ophthalmologist to assess if there's an underlying reason that this developed, as he's old for this to come on.
If nothing is found, then it could be corrected with surgery, I'd think.

I am not a pediatric Ophthalmologist, however, there are some principles that are important: 1) make an appointment with a pediatric MD Ophthalmologist or a general Ophthalmologist with a strong interest in this area of Ophthalmology; 2) is there vision in the deviated eye? If so, this needs to be treated before surgery with amblyopia treatment, which can include patching and atropine; 3) surgery can be done, but can include both eyes with a 70% chance of winning on the first attempt. Success will be greater with greater vision. If no vision, the analogy would be a ship without an anchor, so strabismus surgery may work for a time and then drift.
Having said all of this, I am in agreement that cosmesis is important and that all future children should be evaluated earlier, including next generations.

If you mean drooping eyelid, yes, that can be corrected with Ptosis surgery.

Darab Hormozi

Yes, he should see an ophthalmologist for a check-up.

I think your son needs to see an ophthalmologist asap. He might have a lazy eye and you need to correct it by age 8 at the latest...