This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Which of the following condition is associated with Iris pearls? 
Select and explain. 
A. Sarcoidosis, B. Hansen's disease, C. Tuberculosis, D. Sympathetic ophthalmitis
B: Hansen's disease
Answer: B: Hansen's disease 
Explanation: Iris pearls are pathognomonic for Hansen's disease. They represent small lepromata that have "worked their way through" the interstices of the iris to reach the iris surface. A pathognomonic sign of lepromatous leprosy is the presence at the pupillary margin of smal glistening 'iris pearls' composed of bacilli within histiocytes which resemble a necklace