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wow ... that must be really challenging, what're have kids of their own.
I wonder how they managed when the child is still a baby; they must sure have help from family members, right..
My son has what some call as Lazy Eyes; one eye always wanders off and we constantly have to call out to him to focus himself back again & look at us

I don’t know how they managed when the 2 children were young as they lived in another province and I rarely see them. I do know the wife has a good sense of direction. For E.g. she was in the passenger side of the car and could tell the driver when to turn on each street to arrive at the store.

With sight gone the other senses are stronger.