night vision

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Vision in dim light.

from The Century Dictionary.

• noun Vision or sight that is strongest and best at night; ability to see clearly only at night or in a dim light.

from the GNU version of the Collaborative International Dictionary of English.

• noun The ability to see in reduced illumination (as in moonlight).

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The ability, either naturally, by technology or by superpowers, to see in a low light or even dark environment.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the ability to see in reduced illumination (as in moonlight)