**Core Concept**
Visual hallucinations are a perceptual disturbance characterized by the experience of seeing objects or visual stimuli that are not present in reality. This phenomenon is often associated with various neurological and psychiatric disorders.

**Why the Correct Answer is Right**
Visual hallucinations are most commonly seen in Temporal Lobe Epilepsy and Psychotic disorders, particularly in schizophrenia. The temporal lobe is responsible for processing visual information and is a common site for seizure activity. In the context of schizophrenia, dopamine dysregulation in the mesolimbic pathway can lead to hallucinations. Additionally, visual hallucinations can also be seen in disorders such as Charles Bonnet syndrome, which is characterized by visual loss and subsequent perception of complex visual hallucinations.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as visual hallucinations are not typically seen in anxiety disorders. While anxiety can exacerbate symptoms of psychiatric disorders, it is not a primary cause of visual hallucinations.
**Option B:** This option is incorrect as delirium can cause a range of cognitive and perceptual disturbances, but visual hallucinations are not as specific to this condition as they are to other options.
**Option C:** This option is incorrect as substance-induced psychosis can cause a range of psychotic symptoms, including auditory hallucinations, but visual hallucinations are less common.

**Clinical Pearl / High-Yield Fact**
Visual hallucinations can be a critical clue to underlying neurological or psychiatric pathology. In the absence of a clear medical explanation, a thorough psychiatric evaluation should be conducted to rule out underlying psychotic disorders.

**Correct Answer: C. Dementia with Lewy bodies is a neurodegenerative disorder characterized by visual hallucinations, parkinsonian motor symptoms, and fluctuating cognitive impairment.**