<unk>  is a subtype of<unk> , a visual disturbance defined as the persistent or recurrence of a visual image after the stimulus has been removed.<unk>  is a broad term describing a group of symptoms which is divided into<unk>  and illusory<unk> .<unk>  refers to the projection of an already-encoded visual memory and is similar to a complex visual hallucination: the creation of a formed visual image where none exists.<unk>  usually arises from posterior cortical lesions or seizures and can be the presenting symptom of a serious neurological disease.<unk>  describes afterimages or scenes that are formed, long-lasting, high resolution, and isochromatic. The palinoptic images are not typically reliant on environmental parameters and often present with homonymous visual field deficits.<unk>  occurs unpredictably and the persistent images can appear anywhere in the visual field, regardless of the location of the original stimulus. A patient will often have only a few episodes of<unk> . Visual perseveration is synonymous with<unk> . The term is from Greek: palin for "again" and opsia for "seeing".
Hallucinatory palinopsia
Lexical–gustatory synesthesia
Illusory palinopsia
Agraphesthesia
Homonymous hemianopsia
Hemifacial spasm
Facial toning
Binocular dysphoria