**Core Concept**
Iris bombe is a condition characterized by the formation of a posterior synechiae (adhesions between the iris and the lens or vitreous) leading to an accumulation of aqueous humor behind the iris, resulting in a bowing forward of the iris. This condition typically occurs due to an obstruction in the flow of aqueous humor, leading to increased intraocular pressure.

**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of iris bombe. In this condition, the obstruction of aqueous humor flow is often due to the formation of a posterior synechiae, which can be caused by inflammation, trauma, or other conditions. The increased intraocular pressure causes the iris to bow forward, resulting in the characteristic iris bombe appearance. This is often seen in conditions such as uveitis, retinal detachment, or intraocular tumors.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not directly relate to the pathophysiology of iris bombe. While uveitis can cause inflammation that may lead to posterior synechiae, it is not a direct cause of iris bombe.

**Option B:** This option is incorrect because retinal detachment is a condition that can cause a secondary effect on the iris, but it is not a primary cause of iris bombe.

**Option C:** This option is incorrect because intraocular tumors can cause a secondary effect on the iris, but they are not a primary cause of iris bombe.

**Clinical Pearl / High-Yield Fact**
Iris bombe is a sign of increased intraocular pressure, and it can be a clue to the underlying cause of the condition. It is essential to investigate the underlying cause of iris bombe to prevent further complications and to manage the condition effectively.

**Correct Answer: B. Retinal detachment**