I wanted to add that the doctor said that she MAY need surgery, meaning that she'd be patched and then see? I don't think Dr. O'Malley would recommend surgery if she didn't need it; but get that second or third opinion, even if it's just to put your mind and heart at ease.
Your daughter is in the BEST hands! Dr. O'Malley is the best! My daughter (9) has been seeing him since she was 3. Her pre-school screening indicated lazy eyes (both). She had both eyes patched, alternate days, for 3 hours a day. We did this for many months. At that time, he said that the degree of the "drifting" (my word) was at the threshhold of what most children can tolerate without surgery, or at the smallest degree that would require surgery. Did that make sense? In other words, we had to wait til she was around 8 and see how she'd develop. It was 50/50 whether or not she'd need surgery.
Now she's 9 and he's not recommended surgery so far. The eyes still drift and now I notice it (I never could when she was little). She has a little less control over them now. However, she's just gotten glasses for nearsightedness and he said that may correct a lot of the problem too.
I'm still praying that she won't need surgery; however, if she does, I know she's in the best surgical hands with Dr. O'Malley.
Check around, you'll see that most people who's children have eye problems or whose children have been born premature and need eye care see Dr. O'Malley and they'll say he's the best too!
Plus, he is such a wonderful man. Did you notice all the pictures and stuff on his walls? He coaches kids' hockey. That's pretty demanding!
Leave it in God's hands and see what happens!