I’m not sure if this is good news or bad, but seeing things, as in things that aren’t actually there to see, is quite normal. That’s if what I saw of the article was in fact there and not a figment of my imagination:
There has been a lot of research over the years on perceptions that never reach awareness. For example, people whose visual cortex is damaged are unaware of seeing anything, yet they often react to things in their field of vision. Sergent et al.’s study is significant because it’s not about these kinds of perceptions outside of consciousness. Instead, it’s a demonstration that the mind can edit perceptions before they reach consciousness.