What is astigmatism? Why does it make my vision blurry? And how did I get it?

Have you ever gone to the optometrist for an eye test and were told your eye was shaped like a football?
Or perhaps you’ve noticed your vision is becoming increasingly blurry or hard to focus?
You might be among the 40% of people in the world who live with astigmatism.
What causes astigmatism?
The eye acts like a...