It is theorized that cats have a small capacity for facial recognition, meaning they don’t really read our expressions. So while we can’t read their faces, they can’t read ours, either. Cats do not have expressive faces like dogs, and it all comes down to the fact that they don’t have eyebrows.
Want to know what your cat is thinking?
It can also be a display of surprise or fear, depending on the situation. It is not unusual for a cat’s pupils to fully dilate when they are really excited.