When your eyes adjust to the night time so you can see more clearly. After turning off the lights in your room it appears to be very dark, but once your night eyes adjust its not as dark.
eyes night
eyes night
Phil: Did you finally finish your paper last night?
Dan: Yeah, but I had to use my night eyes to find my folder so I didn't wake my parents.
Dan: Yeah, but I had to use my night eyes to find my folder so I didn't wake my parents.
by Assar December 30, 2008