Right at the moment the baby is born, his visual development begins.
And as it does, quickly his vision will reach adults levels when he is 3-5 years old.
That rapid growth is why his first months are so important to his visual development.
For example, between 3 and 6 months old, a baby usually watches and studies own hands and feet, as well as toys, and widens the visual sphere of attention gradually.
He is able to focus attention almost across the room and to move eyes independently from the head.
At this point, your baby is going to be more interested in toys and pictures.
Make sure toys are within his reach.
And, if you aren’t already, think about starting to read to him from picture books.