This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Trauma, Subject name: Ophthalmology
[{'content': 'Vossius ring is seen in \nSelect and explain. \nA. After cataract, B. Blunt trauma, C. Diabetics, D. Hypertensive retinopathy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. (Blunt trauma) (367 - Parson 20th- 405 -Khurana 4th)Vossius- Ring - is a circular ring of brown pigment seen on the anterior capsule** of the lens* It occurs due to striking of the contracted pupillary margin against the crystalline lens. It is always smaller than the size of the pupil* It is always smaller than the size of the pupil produced by the force of the blow driving the cornea and iris backwards* Rosette - shaped cataract following blunt trauma', 'role': 'assistant'}]