What is night vision how does it work and do I really need it in my next car?

Now that night vision proactively warns of pedestrians and deer, it’s a clearer safety aid, especially in West Virginia. If only it cost $500 not $2,000.

from ExtremeTechExtremeTech http://www.extremetech.com/extreme/193402-what-is-night-vision-how-does-it-work-and-do-i-really-need-it-in-my-next-car