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.
It is important to understand the brain injury for each individual person, because they can be really different. Where the injury is can give us important clues to what motor problems that individual will have. The time you have the biggest risk to having a stroke is as a baby, not as an adult so it is important to understand what may be happening in the infants brain.