Christ Healing the Blind Man. St. John (9:1-7) describes the episode how Christ restored the sight of a man blind from birth: He put an ointment on the eyes of the man and sent him to wash in a pool, on his return the blindness was cured. St. Matthew (20:29-34) describes a similar incident when 2 blind men were cured near Jericho.
See: Duccio di Buoninsegna. Maestà: The Healing of the Blind Man.
El Greco Christ Healing the Blind Man.
Nicolas Poussin Christ Healing the Blind.