I'm trying to obtain images inbetween 'fractional fixations', capturing the ninety waking minutes a day each of us reputedly spends in total darkness...I'm not sure if that's really the same thing as a blink, or if a saccade is even smaller, but even a blink seems to represent cognitively indiscrete moments of darkness, a partial loss of awareness, when 'we are basically sightless' (Cognitive Impact of Eye Movements in Picture Viewing, Gufran Ahmad, Yukio Ohsawa, Yoko Nishihara, International Journal of Intelligent Information Processing, Volume 2, Number 1, March 2011)