## Core Concept
Optic neuritis refers to inflammation of the optic nerve, which can cause sudden vision loss, pain on eye movement, and tenderness to the touch. It is often associated with demyelinating diseases like multiple sclerosis. The condition involves damage to the myelin sheath surrounding the optic nerve.

## Why the Correct Answer is Right
The correct answer is related to the characteristics and clinical features of optic neuritis. Typically, optic neuritis presents with sudden vision loss, often accompanied by pain, especially with eye movements. A key feature is its association with multiple sclerosis, a demyelinating disease. The condition usually affects one eye at a time. Understanding these aspects helps in identifying the correct statement regarding optic neuritis.

## Why Each Wrong Option is Incorrect
- **Option A:** Typically, optic neuritis causes **monocular vision loss** or symptoms in one eye at a time, making statements about bilateral simultaneous involvement less characteristic.
- **Option B:** Pain, especially with eye movements, is a classic symptom, making statements denying this symptom incorrect.
- **Option C:** Association with **multiple sclerosis** is well established, particularly in recurrent cases or in populations with high MS prevalence.
- **Option D:** Without specific details on the options, we infer based on common misconceptions about optic neuritis.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that **optic neuritis often presents with sudden vision loss and pain on eye movement**. Additionally, patients with optic neuritis are at an increased risk of developing **multiple sclerosis**, especially if they have lesions on MRI.

## Correct Answer: D.