It’s all in the way that you perceive things.
______________________________

1. Look from left to right, from top to bottom…

The rod in the middle does not exist.

.~~~HMMM!

2. How many, 7 or 10? Count at the top, then at the bottom:

.~~~HMMM2

3. Does door open to inside or outside?

.~~~HMMM3

4. Round or Square columns?

.~~~HMMM4

5. How many, 3 or 4?

.~~~HMMM5

6. Top or bottom?

.~~~HMMM6

7. Rare construction.

.~~~HMMM7

8. The center beam disappears – look from left to right.

.~~~HMMM8

9. 2 or 3?

.~~~HMMM9

NO I don’t know how they work
but I think I need new glasses!