[ETL]

The black dots seem to appear and vanish at the intersections of the gray horizontal and
vertical lines. Called the scintillating grid, this illusion was first discovered by E. Lingelbach
in 1994 and is a modification of the so-called Hermann grid illusion.

The squares in this optical illusion are actually square, though they appear distorted. The distortions are consistent with
how squares in the real world would change their appearance if one were moving forward toward the center point.

In this so-called Hering illusion, the straight lines near the central point (vanishing point) appear to curve outward.
This illusion occurs because our brains are predicting the way the underlying scene would look in the next moment
if we were moving toward the middle point.

The bat in the picture below seems to flutter, move and/or expand.
Moreover, when you stare for a while at it and close your eyes you will see a white bat!

If you loom toward the center, optimally with short, quick movements, the fuzzy blobs appear to flow outward way faster
than they should. The blobs have these cues of motion in the blur, which tells your brain to anticipate that they've moved
farther than they have. (Illusion was created by David Widders.)

Inside-Out Cube

Called Rubin's vase or Rubin face, this ambiguous figure can be interpreted accurately in
two different ways, demonstrating our ability to shift between focusing on the figure and background.

[Grampa Dave]

I saw the younger woman first and then the older woman in a couple of seconds.

So, I’m a young all most 80 year old.

[walkingdead]

“The black dots seem to appear and vanish “

I dont see any black dots

[sevlex]

[Tax-chick]

I saw the young one. I’m 52. Didn’t see the old one until someone explained it.

[bgill]

Whew, seeing some skinny black dude with big ears on my tv screen for 8 years was just a trick of the mind.

[Wuli]

I saw the young woman. I’m an old geezer.

I think the image you see may not be due to your age, but your outlook on life. A younger person is more generally “looking ahead” and living more “in the now”. But anyone at any age can live that way if they chose.

[Paal Gulli]

Whether you could be bothered to follow the click-bait headline also might show how old you are.