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.
The future of science advancements is endless. In this video Dr. Ted Conway discusses the possibility of thought to speech. One of the really interesting areas of research in biomedical engineering is thought to speech. The concept of thought to speech is fairly straightforward, the execution to make this a reality is a little more complicated.