What happens when you see things at night that aren't there?

Seeing things at night that aren't there, often referred to as visual hallucinations, can occur due to various factors such as sleep deprivation, fatigue, or certain medical conditions. The brain may misinterpret sensory information in low light, leading to illusions or vivid imagery. Additionally, substances like alcohol or drugs can exacerbate these experiences. If such occurrences are frequent or distressing, it is advisable to consult a healthcare professional.