My 15 month old has had an intermittent squint of only her right eye for the past 3 weeks. It is not associated with anything, and she sometimes does it once, sometimes multiple times in a row. It doesnt appear to hurt her. I took her to a pediatric Ophthomologist, and he did not see any problems, but it continues.
Both eye coordination generally take time till the age of 3 to 5 years.  If you have taken advice from Pediatric ophthalmologist. And he said not to worry then I think no to worry