Optimal viewing distance for the newborn is about 6-12 inches
Newborns show a preference for their mother’s face over strangers’ faces in the first few days after birth.
Beginning at 4 months of age, an infant can visually distinguish his or her mother’s face from a stranger’s or an animal’s.
By 3 or 4 years of age, an infant’s visual abilities are equal to those of an adult.