A baby can see from birth, but his vision is not finalized, he is extremely short-sighted. He has a visual acuity of 1 / 20 and so he distinguishes only the contour of the face of people who are placed very close to him because his vision is very vague. His sight takes a year to finalize and he is sensitive to color contrasts (black on white for example). He is also able to fix and follow the look of the person taking care of him. He has a central view, which is why it is important to always stand in front of his eyes when we want to interact with him. He already has the ability to follow an object that moves, provided it is close to his face and very contrasted (black and white).
His vision evolves over the months for, at around 3 months, to move to 1 / 10.
He is then able to recognize familiar objects like a bottle, a blanket, and also perceive the basic colors. For example, a bottle-fed baby shows great enthusiasm at the sight of it. We notice that he likes then to observe his hands and that he fixes them in the distance.
Then, little by little, his field of vision widens and he perceives well the bright colors like the red and the yellow which attract him.
At around 1 year his vision is 4 / 10 and he has as good panoramic view as an adult.
However, it is necessary to wait until he reaches the age of 4 to have a perfect vision of 10 / 10.