Effect: Hold your two hands in front of you at eye level. Point your
index fingers towards each other, as illustrated in the picture above.
Leave a little space (an inch or so) between your two index fingers.
With your fingers at eye level, stare at and focus on a
wall or an object in the distance (a few feet away).
What You'll See: You should see a finger with two ends floating in
between your two index fingers. If you are having problems seeing
it, try moving your fingers toward your eyes
(keeping them at eye level). Try this illusion with your two index
fingers actually touching each other as well.