This will make you nuts!!!!!

1. Look from left to right from top to bottom. The rod in the middle does not exist.   2. How many, 7 or 10. Count at the top and then at the bottom.     3. Is the door open to inside or outside?     4. Round or square?   5. How many, 3 or 4?     6. Is this just one?   7. Rare construction.    8. The center beam disappears, look from left to right. 9.    2 or 3?    And NO I don't know how they work, but I think I need new glasses!