____________ is a pigmented ring on the anterior lens surface that results from contact with the pigmented iris epithelium following trauma.

____________ is a pigmented ring on the anterior lens surface that results from contact with the pigmented iris epithelium following trauma.

• A. Vossius Ring
• B. Horner's Ring
• C. Cannon Ring
• D. Zinn's Ring

Answer: (A)

Vossius ring occurs when blunt trauma causes the iris pigment epithelium to rub against and abrade the anterior lens capsule. Pigment from the iris epithelium deposits on the anterior lens surface, forming a pigmented ring that matches the area of contact. This sign indicates prior trauma and is most noticeable after a recent blunt injury, though it can persist afterward. The other ring names describe different phenomena or mechanisms and do not fit this specific pigment transfer from iris epithelium to the lens.

Vossius ring occurs when blunt trauma causes the iris pigment epithelium to rub against and abrade the anterior lens capsule. Pigment from the iris epithelium deposits on the anterior lens surface, forming a pigmented ring that matches the area of contact. This sign indicates prior trauma and is most noticeable after a recent blunt injury, though it can persist afterward. The other ring names describe different phenomena or mechanisms and do not fit this specific pigment transfer from iris epithelium to the lens.