Why autistic people avoid eye contact?

There are reasons why autistic people avoid eye contact is because it does get them into a lot of stress and anxiety when they're forced to look at someone in the eye. A lot of people would think they're not paying any attention. That they're ignoring them on purpose. Even though, that's not true. They might glance at you or look at your hands, or your mouth. They may respond to some questions and greet people. But doesn't mean they're being rude or not paying any attention to you. If they use eye contact during conversations, it's mostly because looking at the details and facial expressions you make when you talk. They miss out on all the things people are saying.