1. A system for monitoring an eye and determining eye closure, said system comprising: a video imaging camera oriented to generate images of an eye; and a video processor for processing the images generated with the video imaging camera, said video processor comprising an edge detector for detecting edges of the eye in the image and a line selector for selecting a plurality of lines representative of the detected edges at multiple selected angles, said processor determining a state of eye closure based on the number of said lines at selected angles.