Jesus heals a man born blind in this Sunday’s gospel, but many of those around him with good vision were unwilling to see the miracle in front of them. While modern science has yet to find a cure for blindness, promising studies are under way as researchers are gaining a new appreciation of how the brain of a person blind from an early age makes new connections that enhance hearing, smell, and touch, as well as memory and language.

"No legs, no vision, no problem."

Cataracts remain the leading cause of blindness globally, except in the most developed countries. Globally about 80 percent of all visual impairment is avoidable.