On a boat delivery in the short days of November one year, we had use of an Ex military night vision unit. It could be handheld like binoculars or strapped to your head and worn. It had a single objective lens and two eyepieces: monocular in, binocular to you.
IT WAS AAAMAZING.
I still am struck by how well it worked. To some degree, better than daylight but no magnification of size. I think it intensified the existing light. Iím not sure what light it was intensifying because it looked pitch black! If there was light ahead, like car headlights or street lamps on shore, these disrupted your view horribly because it intensifies them too.