I make light-driven installations that stimulate (behind closed eyes) colourful patterns of phosphenes: ‘form constants’ and ‘Flicker’ visuals intrinsic in these ephemeral artworks during which I also monitors percipients’ brainwaves using a portable EEG system. In the 1950s these were triggered by Neuro Scientists for clinical research into epilepsy and mescaline’s effects using strobe lights,  this revealed a wealth of patterns known as ‘Entoptics’ that appear very similar to early cave art