**Question:** A 16-year-old male was brought with removal of clothes while watching movies complaints of seeing wave like forms and sudden monocular blindness. The diagnosis is:

A. Optic neuritis
B. Migraine
C. Vestibular migraine
D. Benign paroxysmal vertigo

**Correct Answer:** D. Benign paroxysmal vertigo (BPPV)

**Core Concept:** Benign paroxysmal vertigo (BPPV) is a disorder characterized by episodes of vertigo (dizziness) induced by head movements, usually in response to specific maneuvers like the Dix-Hallpike test. BPPV is caused by the dislodgement of otoconial particles from the utricle or saccule within the inner ear and their settling in the canals, causing impaired balance and dizziness.

**Why the Correct Answer is Right:**

BPPV is the correct answer because it presents with sudden monocular blindness (hypoacousia) and wave-like forms seen during removal of clothes while watching movies (head movements). These symptoms are caused by the dislodgement of otoconial particles from the utricle or saccule within the inner ear and their settling in the canals, which impairs balance and provokes vertigo and hypoacousia during specific head movements like the Dix-Hallpike test.

**Why Each Wrong Option is Incorrect:**

A) Optic neuritis: Optic neuritis refers to inflammation of the optic nerve, leading to visual disturbances but not specifically during head movements.

B) Migraine: Although migraines can cause dizziness, BPPV presents with specific symptoms during head movements, while migraine symptoms are generally unilateral and not provoked by specific maneuvers.

C) Vestibular migraine: Vestibular migraine shares some symptoms with BPPV, but it occurs during migraine attacks, not specifically during head movements.

**Core Concept:**

Benign paroxysmal vertigo (BPPV) is a specific type of vertigo caused by the dislodgement of otoconial particles from the utricle or saccule within the inner ear. These particles settle in the canals, impairing balance and provoking vertigo and hypoacousia during specific head movements like the Dix-Hallpike test.

**Why Each Wrong Option is Incorrect:**

A) Optic neuritis: Optic neuritis is an inflammation of the optic nerve leading to visual disturbances but not specifically during head movements.

B) Migraine: Although migraines can cause dizziness, BPPV presents with specific symptoms during head movements, whereas migraines are generally unilateral and not provoked by specific maneuvers.

C) Vestibular migraine: Vestibular migraine shares some symptoms with BPPV, but it occurs during migraine attacks, not specifically during head movements.

**Why the Correct Answer is Right:**

Benign paroxysmal vertigo (BPPV) is caused