Professional infant care centers may not be able to provide the intensity of stimulation that parents will give to their babies.
We know that the child is ready to perceive visual patters and actually prefers them. From minute one, then, the goal is to pick up and hold (carry) the infant as frequently as possible, and in doing so provide him/her with that 3D view of their favorite pattern--a face!
Unless one is deaf, it is also very beneficial to talk to the child a lot while doing it. Deaf parents should sign to their babies but only hopefully after they have put them down!
Only parents and relatives are typically motivated enough to do all this to the extent that I would like to see.
For them it is a labor of love. For others it is labor, and the focus is often on labor relations rather than on what is best for the child.
There are many other sources of visual patterns for stimulation. Stores are full of mobiles, which can be hung over the crib. During those times when baby is going to sleep or waking up they may get some enjoyment and stimulation from them.