Thank you for your reply.
Your likely have either monofixation or eccentric fixation symptoms: With her very you age, she could re-adjust better with time.
The cause of such problem is the due to the strabismus, her vision in the lazy eye
is less, and so she is not able to have perfect depth or stereovision (called monofixation syndrome). So, when watching the TV she is constant trying to shift her head side to side to better appreciate the position or depth of the image in view. It is also possible, that the strabismus caused the center line of focus of your daughter's eye to shift slightly (called eccentric fixation). With the deviated present, the line of focus at the back of formed. However, after the correction of the deviated eye, the line of focus which was previously registered in the brain has not completely re-adjusted. So, to compensate and prevent seeing double or distorted image, she tends to shift her head position.
I suggest that you ask her doctor to evaluate her for monofoxation syndrome and/or eccentric fixation syndrome. If not improved, at later age there could be eye exercises (when she is able to follow instruction which may help her adjust to the condition better). It is also quite possible that she will out grow some of it and re-adjust better since her eyes are still developing.
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