Summation: tunnel vision (with no peripheral vision at all), darkness and blurring with quick change of focus, red tint, light sensitivity with above-average night vision, intensity of patterns and detail, crappy parsing of imagonem, slight halo caused by strong mentem presence which leaves a visible trace of recent movement.
Nil's vision without glasses is pretty much what your bedroom looks like when you wake up at 3am and there's a light on two rooms over, only blurrier.
