Can a hairline fracture to the skull cause a child to have squint?
I very much doubt that the amblyopia was related to the skull fracture. In fact, I have never heard of this happening, and it would probably be reportable in the medical literature. The cranial nerves do send nerve supply to the muscles that move the eyeball. A damaged cranial nerve could cause these symptoms, but a tiny skull fracture like that was unlikely to be related to any nerve damage like that. Anyway, lazy eye is very common, and the treatment is usually performed in the preschooler age group. I think you already had amblyopia. Why do you wonder this now that you are grown? Surely it no longer matters.