Answer:
Often found in doctor's offices and pirate flags
You'll have to consult an optometrist if you want to improve this.
Itβs so fragile even just saying its name can break it. What is it?
What can go up but never come down?
Brothers and sisters I have none but this man's father is my father's son. Who is the man?
I am a room that has a roof but no walls. What am I?