Is it normal that i see strange black spots and shadows?
I keep seeing weird black hallucination-like things appearing. They usually appear somewhere where I could only see them with the edge of my eye. I saw one 10 minutes ago. I was on my computer and suddenly with the edge of my eye I saw a black bird flying in my room. I quickly turned my head to see what it was and it disappeared. I see things like such every two days or so. I have never used any kind of drugs. I wonder what these things are and why I see them.