Answer: less than 5 months old
Explanation: Babies are born short-sighted and when they are born their eyesight ability is just starting to develop though it will take months for infants vision to be clear. At the beginning, everything they see is blurry but during the first month, infant's eyes start to adapt and the vison gets better. The ideal distance for infants to see their parents face is about 8 to 10-12 inches away. When they are about three months old, babies begin to develop coordination and around that time they should start tracking objects in motion and try reaching for things around them.