Vossius ring forms due to contact with the pigmented iris epithelium contacting which structure?

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Study for the NBEO Ocular Disease Part 1 Test. Use flashcards and multiple choice questions, each with hints and explanations, to prepare for your exam! Get ready for your success!

Multiple Choice

Vossius ring forms due to contact with the pigmented iris epithelium contacting which structure?

Explanation:
Vossius ring appears when pigment from the pigmented iris epithelium is transferred to the lens surface during blunt eye trauma. The iris comes into contact with the anterior surface of the lens, so pigment from the iris epithelium rubs onto the anterior lens capsule and leaves a pigmented ring. The other structures listed aren’t the surfaces that interact in this injury pattern: the cornea isn’t the surface involved, the iris itself wouldn’t acquire a ring on its own, and the posterior lens surface is on the back of the lens, not the side that contacts the iris during trauma.

Vossius ring appears when pigment from the pigmented iris epithelium is transferred to the lens surface during blunt eye trauma. The iris comes into contact with the anterior surface of the lens, so pigment from the iris epithelium rubs onto the anterior lens capsule and leaves a pigmented ring. The other structures listed aren’t the surfaces that interact in this injury pattern: the cornea isn’t the surface involved, the iris itself wouldn’t acquire a ring on its own, and the posterior lens surface is on the back of the lens, not the side that contacts the iris during trauma.

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