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Depending on the content, visual hallucinations can be classified as either simple or complex. [1] Simple visual hallucinations are commonly characterized by shapes, photopsias, and grid-like patterns. [6] Complex visual hallucinations consist of highly detailed representations of people and objects. [6]
Shadow people are commonly reported by people under the effects of deliriant substances such as datura, diphenhydramine, and benzydamine. Finally, visual hallucinations, such as those caused by schizophrenia and bipolar disorder, may appear to be shadowy figures at the edge of peripheral vision. [19]
In dementia with Lewy bodies, visual hallucinations feature objects appearing to move when they are still, as well as complex scenes involving people and inanimate objects that do not exist. [14] Charles Bonnet syndrome is characterized by visual hallucinations in visually impaired individuals, often depicting clear and detailed images of ...
Alice in Wonderland Syndrome (AIWS), also known as Todd's Syndrome or Dysmetropsia, is a neurological disorder that distorts perception.People with this syndrome may experience distortions in their visual perception of objects, such as appearing smaller or larger (), or appearing to be closer or farther than they are.
The Native American little people have been said to reside in the Pryor Mountains of Montana and Wyoming. The Pryors are famous for their "fairy rings" and strange happenings. Some members of the Crow tribe consider the little people to be sacred ancestors and require leaving an offering for them upon entry to the area. [14]
The hallucinations are normally colorful, vivid images that occur during wakefulness, predominantly at night. [3] Lilliputian hallucinations (also called Alice in Wonderland syndrome), hallucinations in which people or animals appear smaller than they would be in real life, are common in cases of peduncular hallucinosis. [1]
Micropsia is a condition affecting human visual perception in which objects are perceived to be smaller than they actually are. Micropsia can be caused by optical factors (such as wearing glasses), by distortion of images in the eye (such as optically, via swelling of the cornea or from changes in the shape of the retina such as from retinal edema, macular degeneration, or central serous ...
Prosopometamorphopsia is considered a face hallucination and is included under the umbrella of complex visual hallucinations. [7] Unlike other forms of hallucinations such as peduncular hallucinosis or Charles Bonnet syndrome, prosopometamorphopsia does not predominate at a particular time of day; it is a constant experience. [7]