**Core Concept:** Iridocyclitis is an inflammation of the iris and ciliary body. Iris bombe is a severe complication of iridocyclitis where the iris thickens and constricts, leading to pupil obliteration and loss of vision. Synechiae are adhesions between the iris or iris and cornea.

**Why the Correct Answer is Right:** In iridocyclitis, the inflammatory process results in the proliferation of iris stromal cells and the formation of iris synechiae. Type C synechiae (posterior synechiae) occur between the iris and the lens, and are responsible for iris bombe formation due to constriction and thickening of the iris. This leads to pupil obliteration and vision loss.

**Why Each Wrong Option is Incorrect:**

A. Posterior synechiae (Type C) are responsible for iris bombe formation, not anterior synechiae (Type A).
B. Anterior synechiae (Type A) form between the cornea and the iris but are not related to iris bombe formation.
D. Anterior synechiae and posterior synechiae can occur simultaneously but only type C synechiae cause iris bombe formation.

**Clinical Pearl:** In iridocyclitis, the severity and progression of iris bombe formation depend on the extent of synechiae formation (posterior synechiae). Early diagnosis and management are crucial to prevent vision loss.