Update: My daughter has refractive amblyopia (lazy eye) in her right eye. Basically she is very farsighted in her right eye and will need to wear glasses and also patch the good eye for 3 hours a day at least until we follow up in 3 months.
The dr was surprised I had not taken her for a comprehensive eye exam before, but no one had ever told me to I needed to. I called her pediatrician after the eye dr appt to let her know about the diagnosis and ask if I had missed anything from previous well visits. According to what I've read, amblyopia typically begins in infancy and early childhood, but according to our pediatrician, my daughter was fine in her previous 3 vision screenings. So it must have somehow just developed in the past year.
Of course, I've also since read that every child should have a comprehensive eye exam between the ages of 3-5, and I'm now kicking myself for not doing so. And for some reason I remember asking our first endo - in the hospital when Liz was diagnosed and before she was discharged - if I should take her to an ophthalmologist for an exam and she replied "no." Aaaargh! I should have pursued my own research way back then.
At any rate, hopefully the glasses and patching will correct her vision and we caught it before it progressed any further.