From JON BENNETT-SNEWIN
Q: I have just read ‘Psychedelic breakfast’ (Questions, 26 March). I
have experienced a similar effect. While walking around at work, I notice
that computer VDU screens displaying black text on a white background flash
at the same rate as my footsteps. When I stop walking, the flashing ceases.
I also get this effect if I bring my teeth together reasonably hard. What
is happening and is this effect related to the breakfast phenomenon questioned
earlier?
Jon Bennett-Snewin Maidenhead, Berkshire
