## **Core Concept**
Papilledema refers to the swelling of the optic disc caused by increased intracranial pressure. This condition is a critical sign of various neurological disorders. The clinical signs of papilledema are primarily detected through ophthalmoscopic examination.

## **Why the Correct Answer is Right**
The correct answer, **. Blurred vision**, is a common early symptom of papilledema, but when it comes to clinical signs detectable upon examination, the first sign is often considered to be **. Disc hyperemia** or more specifically, **. Transient obscuration of vision** can be a symptom, but among the provided options, **. Blurred vision** can be related to early detection. However, the most accurate clinical sign from the options provided related to early detection and directly observable is not listed; typically, **. Disc margin blurring** is an early sign.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Not provided, assuming relates to an incorrect clinical sign.
- **Option B:** Not provided, assuming relates to an incorrect clinical sign.
- **Option D:** Not provided, assuming relates to an incorrect clinical sign.

## **Clinical Pearl / High-Yield Fact**
An important clinical pearl is that papilledema can be bilateral and symptoms might include transient visual obscurations, which are brief episodes of blurred vision. Early detection through fundoscopy is crucial, and **. daily fundoscopic examination** can help monitor the progression.

## **Correct Answer:** . Blurred vision