Parents of an unborn child were advised to abort, based on a calculated risk that the baby could be born with a deformity. They declined, and persisted with the birth. The baby did show signs of eye defects, and was totally blinded at a young age in a sports accident. However he grew up revelling in music and church, and is today a devout Roman Catholic, and has sung before the Pope.
Judge for yourself whether the world lost or gained by his parents decision to reject the suggested termination: