ILLUSIONS

Got the idea from this TUMBLR.  It works for me without any dots, but here's a negative with just a red dot.  Stare at it for 30 seconds and then just look at a wall.  Blinking at the wall helps.
My walls are light aqua, so maybe that's why it works so easily for me. Let me know.

Stare at the tip of Adam's nose 20 seconds, then at the wall:

Stare at tip of Adam's nose:

STARE BETWEEN MUSTACHE AND NOSE, CENTER:

STARE TIP OF SAULI'S NOSE FOR 20 SEC, THEN AT THE WALL AND BLINK:

STARE RIGHT BELOW THE TIP OF SAULI'S NOSE:

STARE BETWEEN SAULI'S TOP LIP AND NOSE:

STARE AT RED DOT:

STARE BETWEEN SAULI'S UPPER LIP AND NOSE: