Even in the womb babies can tell the difference between light and dark. And at birth, they see shapes by following the lines where light and dark meet. Yet, they are several weeks old before they can see their first primary color – red.
In their first weeks and months, babies learn to use their eyes – actually their eyes “learn” how to see. While each eye has the physical structure it needs to begin to see normally, the two eyes haven’t learned to work together yet – and this “binocular vision” develops quickly throughout the first few weeks and months of life.