Choreographer Ping Chong’s latest work is guaranteed to provoke thoughts about the recent Abu Ghraib torture scandal, but it wasn’t designed that way. The actual subject of “Blind Ness: The Irresistable Light of Encounter,” which premiered this spring in Ohio and moves to New York this week, is the brutal but century-old maiming and killing of Africans in the Congo by an occupying force of Belgians. But Chong has a history of creating provocative works, and the apparent American policy of torture and intimidation in Iraq makes the performance resonate like a national gut punch.