## **Core Concept**
The question tests knowledge on the causes of recurrent vitreous hemorrhage, particularly in a young patient. Vitreous hemorrhage refers to bleeding into the vitreous cavity of the eye, which can result from various conditions. In young patients, certain conditions are more likely to cause recurrent vitreous hemorrhage.

## **Why the Correct Answer is Right**
The correct answer, **Retinal vasculitis or Eales disease**, is a condition characterized by inflammation of the retinal blood vessels, leading to vascular occlusion, ischemia, and neovascularization. This process can cause recurrent vitreous hemorrhages, especially in young adults. Eales disease is a classic cause of recurrent vitreous hemorrhage in this age group.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Diabetic retinopathy is a common cause of vitreous hemorrhage, but it typically presents in older adults with a history of diabetes. While it's possible in younger patients with long-standing diabetes, it's less likely to be the first consideration in a young patient without a known history of diabetes.
- **Option B:** Age-related macular degeneration (AMD) is primarily associated with older adults and is less likely to cause vitreous hemorrhage; it's more commonly linked to choroidal neovascularization and disciform scars.
- **Option C:** Trauma is a significant cause of vitreous hemorrhage but usually presents with a clear history of eye injury. Recurrent vitreous hemorrhage without a history of trauma or in the absence of other symptoms might steer the clinician towards a more systemic or intrinsic ocular cause.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that Eales disease often presents with recurrent vitreous hemorrhages and retinal neovascularization in young adults, particularly those in their 20s and 30s. A high index of suspicion for Eales disease should be maintained in such cases, especially in the absence of diabetes or trauma.

## **Correct Answer:** . Eales disease