Pain.

This morning I accidentally used contact cleaner instead of saline solution when putting in one of my contacts.

I cannot express how much that hurt.

But I can try: Imagine having a vial of potent acid and not pouring it into your eye - no, that would be too easy. You use a tiny eye-shaped suction cup and rub it in the acid and then adhere the acid-soaked suction cup directly to your eyeball. Just imagine that. If you do, you might understand 4% of how much my eye hurt this morning.

So I am wearing glasses today.