PVS-14 Multi-Purpose Night Vision Monocular/Night Vision PVS-14 Auto Gated Military Spec Monocular. Night Vision is a precision electronic instrument used to observe the target in the night and twilight. In order to meet in a very low light intensity, night vision with infrared irradiation light source, turn on the power switch, you can adjust its brightness by switching. OP-168 is a day and night of night vision comes with infrared the irradiated light source. Under bright and dim light it shows color lmages while black and white image in darkness. OP-168 own infrared irradiation ...