**Question:** Which of the following is the most common cause of vitreous hemorrhage in young individuals: March, September 2005

A. Trauma
B. Diabetes
C. Vascular Ehlers-Danlos Syndrome (EDS)
D. Retinal vein occlusion

**Core Concept:** Vitreous hemorrhage is a medical condition characterized by bleeding within the vitreous humor of the eye, which is a clear gel-like substance that fills the majority of the eye's interior. Vitreous hemorrhage can lead to vision loss and requires prompt medical attention. Understanding the underlying causes is crucial for accurate diagnosis and appropriate treatment.

**Why the Correct Answer is Right:**

C. Vascular Ehlers-Danlos Syndrome (EDS) is a group of genetic connective tissue disorders characterized by loose, fragile connective tissue. One of the key features of EDS is the increased risk of spontaneous bleeding due to abnormal clotting mechanisms. In the context of vitreous hemorrhage, the bleeding in EDS patients is often spontaneous and usually occurs in young individuals, making it the most common cause among the options presented.

**Why Each Wrong Option is Incorrect:**

A. Trauma is a known cause of vitreous hemorrhage, but it is less common in young individuals compared to vascular EDS.
B. Diabetes is a risk factor for various ocular complications, but it is not the most common cause of vitreous hemorrhage in young individuals.
D. Retinal vein occlusion is a condition involving blockage of the retinal veins, leading to retinal ischemia. This condition is typically associated with older patients, not young individuals.

**Clinical Pearl:**

Vascular Ehlers-Danlos Syndrome (EDS) is a condition to be considered in the differential diagnosis when evaluating young individuals with spontaneous vitreous hemorrhage. Prompt genetic counseling and referral to a specialist are essential for proper management and prevention of further complications.