Principles Of Night Vision

Figure 5-1. Daytime field of view using pinpoint focus.

Figure 5-2. Nighttime field of view uainjj off-center vision

Look slightly away from object so that the Image is formed on the nod region (your night eyes).

Look slightly away from object so that the Image is formed on the nod region (your night eyes).

Principles Marksmanship
NOTE: Vision is shifted slightly to one side, but attention is still on the object. Because of the blind spot at the center of vision, directing attention to an off-centered objective is possible (with practice).

Scanning. Scanning is the short, abrupt, irregular movement of the soldier's eyes around an object or area every 4 to 10 seconds. Off-center vision is used. Scanning ranges vary according to visibility.

NOTE: For detailed information on the three principles, see FM 21-75.

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