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
Positive forced duction test is seen in ? 
Select and explain. 
A. Extraocular muscle palsy, B. Mechanical restriction of ocular movement, C. Concomitant squint, D. None
B: Mechanical restriction of ocular movement
Answer: B: Mechanical restriction of ocular movement 
Explanation: Ans. is 'b' i.e., Mechanical restriction of ocular movement forced duction test : Resistance encountered during passive rotation and is seen in incomitant squint due to mechanical restriction. Negative forced duction test :No resistance during passive rotation and is seen in extraocular muscle palsy