New Year's Eve 2012

It's possible that Zechariah was indicating that the Antichrist will be wounded in the arm and right eye by a sword wound.

Revelation 13:3 tells us that someone will kill the Antichrist with a "wound to death."

Zechariah may call him the idol shepherd because the False Prophet will set up an idol or statue of the Antichrist in the rebuilt Temple to be worshipped by the people.
Revelation 13:14,15

In contrast to Jesus Christ, the Good Shepherd, who gives His life for His sheep, the Antichrist is called the 'idol shepherd.'

His purpose, as an evil shepherd' will be to use and destroy the sheep for his own benefit.

"For, lo, I will raise up a shepherd in the land, which shall not visit those that be cut off, neither shall seek the young one, nor heal that that is broken, nor feed that that standeth still: but he shall eat the flesh of the fat, and tear their claws in pieces.
Woe to the idol shepherd that leaveth the flock! the sword shall be upon his arm, and upon his right eye: his arm shall be clean dried up, and his right eye shall be utterly darkened."
Zechariah 11:16,17