How hard is it to fly with night vision goggles? I was talking to a Sheriff's Department helicopter pilot and he was saying they fly around at night with night vision goggles.  I know the military does too.

What are some of the considerations that pilots flying with night vision goggles have to deal with when learning to fly with them?

How long does it take for someone to be certified/trained to fly with night vision goggles?

What is the most difficult part about it? Could civilians do it if they owned the gear?
All those answers are pretty wrong.  One eye..Can't read the instruments.. Aviation ANVS like the ANVS 9's are dual tube.  You focus them to your liking,individually for each eye!  I personally get 20/20 with them and you mount them high and simply look under them to read the instruments! I have over 7,000 hours of single pilot NVG.  They make things safer, easier, and it's just like flying during the day, only everything is green.  Things like towers and wires (powerlines) are actually MORE visible under NVG's.  It usually takes established pilots with zero NVG time only a few hours to adjust.  Nothing to it.