**Core Concept**
Perceptional disorders, also known as perceptual disturbances, refer to distortions in the processing of sensory information. These disorders can affect various senses, including visual, auditory, and tactile perception. They often have a profound impact on a patient's quality of life.

**Why the Correct Answer is Right**
The correct answer is a disorder that does not involve a distortion in the processing of sensory information. In the context of perceptional disorders, disorders that primarily involve mood or thought disturbances are not considered perceptional disorders. Mood and thought disturbances are characteristic of psychiatric disorders, which are a distinct category from perceptional disorders.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a disorder that involves a distortion in the processing of sensory information, specifically visual perception. It is a classic example of a perceptional disorder.

**Option B:** This option is incorrect because it is a disorder that involves a distortion in the processing of sensory information, specifically auditory perception. It is another example of a perceptional disorder.

**Option C:** This option is incorrect because it is a disorder that involves a distortion in the processing of sensory information, specifically tactile perception. It is yet another example of a perceptional disorder.

**Clinical Pearl / High-Yield Fact**
It's essential to differentiate between perceptional disorders and psychiatric disorders, as they have distinct underlying mechanisms and treatment approaches.

**Correct Answer: D.**