What is is with ask-public and questions about hypnagogic hallucinations? The only times I have had any problems with my peripheral vision was when I first started wearing glasses. It took me while to get used to the temples of the glasses, there in my peripheral vision. That’s about it. The only time that I have ever seen anything remotely resembling “shadow people” is that there have been times, a few times, when I have been driving for a reasonably good distance on long, dark, backroads at night and have occasionally “semi-hallucinated” people standing on the side of the road. A little creepy and weird, somewhat startling, but fortunately a very rare occurrence.