Imagine the book is a dartboard.
your nose is a dart.
The middle of the centrespread is the bullseye.
hit the bullseye.
all will be black apart from little chinks of light the tops and edges let through.
LOOK STRAIGHT AHEAD.
like there is some big bloke 2 feet in front of you.
slowly pull the book away KEEP staring at that imaginary big bloke in front.
THERE IS YOUR BLIP!.
but if you can't get it dont worry my mum doesnt do it she prefers
daydream soft focusing down the centre of the page.
Now unless you have medical eye problems that should be a bit more explanitory
in working the blip out.
good luck!