My dd is 9 weeks old and several times per day her eyes cross inward. This can be both eyes together or either side individually. The rest of the time her eyes seem to be normal and work together. She watches faces and can track objects with both eyes so I am unsure whether her eye muscles are still developing or whether I should be concerned. It seems to happen more when she is in a sitting position and mostly looks like she is focusing in on her nose or smetimes an object close up. I have mentioned it to the doc who said she would check her at 6mths. Has anyone else experienced this? Should I get a 2nd opinion?