You’re actually always hallucinating to some extent. You have a blind spot in both of your eyes where the optic nerve attaches to the retina. Your visual cortex just fills in what it thinks should be there. Mood can also play a role in how you see things and how attractive a person or object may appear to you. Or have you been sick lately with a fever? Sometimes even that feels like being on drugs visually. Your brain is creating everything you see. Not your eyes.
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