In the newly sighted, learning to see demands a radical change in neurological functioning and, with it, a radical change in psychological functioning, in self, in identity. The change may be experienced in literally life-and-death terms. Valvo quotes a patient of his as saying, 'One must die as a sighted person to be bom again as a blind person,' and the opposite is equally true: one must die as a blind person to be born again as a seeing person.