1. A head-mounted night vision system comprising: a head attachment apparatus configured to attach to a user's head; and a night vision subsystem comprising: one or more night vision image sensors attached to the head attachment apparatus; each said sensor receiving low intensity ambient input light comprising at least one wavelength in the visible to near infrared range, and producing a digital image of the input light; a processor that receives the digital image(s) from the digital night vision image sensor(s), for processing the digital image(s) to produce a wide-field image, said wide-field image spanning at least 60 degrees of a user's horizontal field of view; and a display and eyepiece attached to the head attachment apparatus, the display receiving and displaying the wide-field image, and the eyepiece positionable between the display and the user's eye to image the wide-field image into the user's eye.