Cerebral palsy is caused by damage to the infant brain. This damage can involve not only the motor parts of the brain, but also the parts that deal with vision. This is not related to damage to the eye but is related to damage of the parts of the brain that process visual information.
Sleep is important to all of us, but it's especially important for infants. When infants go to sleep, they start to create neural networks about what they've been learning during the day. It's estimated that as many as one in five children with disabilities have a sleep disorder, and that's higher than the rate of typically-developing children. Finding sleep interventions for these children is incredibly important so they can lay down their brain networks and continue to learn during their early childhood years.