It was Labor Day 2010, and my husband Eric and I took our three kids, Gannon, 4, Jordyn, 3, and Cohen, 1, for an outing in the park. We arrived home in time for lunch and naps.

As I was talking to the kids, I noticed that Jordyn's left eye was slightly turned in. I panicked. Maybe her recent sleepless nights and irritability were more than the night terrors our doctor suggested she was having.

So, I put our daughter...