Every perception, memory and interaction is influenced, for better or worse. I thing of autism not as a disability or syndrome, but as a way of living, a variant of the human condition. Here's just a few aspects where autism makes my life noticeably different. My senses are noticeably different to those of most people, both in the senses themselves and the way the information is processed. Most of the time, I see things pretty much as most people see them.
Attention is an important factor.
I see things which have my attention focused on very easily, but anything outside of the scope of my attention can be easily overlooked. Tiredness also plays a part. Hearing I am somewhat hypersensitive in hearing, and this has a few noticeable effects. In quiet settings, I tend to clearly hear noises which are at or slightly below the threshold of most peoples' hearing. As a result, sleeping in an environment where sudden, even if soft, noises occur is difficult.