While the message is clear to keep children from sleeping on their stomachs, the importance of rotating a baby's sleeping position has not been heard.
Positional molding occurs very early in life, usually in the first few weeks.
The weight of the brain against the infant's soft skull causes the skull to flatten if the head rests in the same position all the time. Once molding begins, if the baby is not placed in different positions, the flattening may even worsen. The entire skull can shift and eventually cause deformity of the face, as well. Without treatment, shifting of the face may lead to an imbalance of the eyes. This may cause a loss of depth perception.