Type of hallucination
| Feature | Possible Cause |
|---|---|
| Monocular | Eye disease or optic nerve proximal to optic chiasm |
| Limited visual field | Focal lesion in visual pathway |
| Simple, brief, unformed | Eye disease, migraine, seizure, calcarine lesions |
| Visual distortion | Seizures, CJD |
| Lilliputian | Delirium, intoxication, withdrawal |
| Frightening | Delirium, hallucinogens, psychosis |
| Unconcerned/preserved insight | Charles Bonnet syndrome, peduncular hallucinosis |