We never talked again

I was sitting at lunch with a couple of my friends. A new girl we just met was sitting across from me. She was telling me how her weekend was. Usually when I talk to people, especially girls, I’m all for the eye contact. However, as this girl was talking to me, she kept looking directly at my friend to the left of me. She kept talking on and on. She kept looking at my friend. I kept getting angrier and angrier. What was she doing? Was she messing with me or something? Finally, I couldn’t take it any more. I yelled at her-

“What are you doing!? Why are you looking at Steve when you’re talking to me!?”

Everyone at the table got dead silent and stared at me in horror. The girl looked at Steve and said to me-

“I have a lazy eye.”