## **Core Concept**
Trachoma is a chronic keratoconjunctivitis caused by *Chlamydia trachomatis*, leading to corneal and conjunctival inflammation. Corneal signs of trachoma include pannus formation, corneal ulcers, and scarring. Understanding these signs is crucial for diagnosing and managing trachoma.

## **Why the Correct Answer is Right**
The correct answer, , is not a corneal sign of trachoma. The common corneal signs include:
- **Pannus formation**: Ingrowth of blood vessels from the limbus into the cornea.
- **Corneal ulcers**: Superficial or deep ulcers can occur due to secondary infections.
- **Scarring**: Leads to conditions like corneal opacity.

## **Why Each Wrong Option is Incorrect**
- **Option A:** is a known corneal sign of trachoma, often presenting as a result of chronic inflammation.
- **Option B:** represents another corneal involvement in trachoma, indicating active disease.
- **Option D:** is associated with trachoma, reflecting chronic disease and potential complications.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that trachoma can lead to **corneal opacity**, a significant cause of preventable blindness worldwide. Early detection and treatment are critical to prevent long-term vision loss.

## **Correct Answer: D. Bitot spots**