Derryberry was reported, a blind 20-year-old man who could clearly recall every day of his life since the age of about 11. Derryberry had been born at 27 weeks, weighing just over  and was in neonatal intensive care for 96 days. A severe brain hemorrhage was the likely cause of cerebral palsy, and his prematurity resulted in congenital blindness.
Derryberry was documented, a blind 20-year-old man who could distinctly remember every day of his life since approximately age 11. Derryberry had been born prematurely at 27 weeks, weighing just over, and spent 96 days in neonatal intensive care. A severe brain hemorrhage was the likely cause of cerebral palsy, and his prematurity resulted in congenital blindness.