###Rationale: Given the age of the child in question, any test has to be performed under anesthesia(EUA), since the child will not cooperate for any examination. During EUA: Refractive error examination is done to rule out hypermetropia as a cause of B/L adduction. Force duction test is used for diagnosis of Restrictive strabismus (eg Duane's retraction syndrome).

###Answer: OPTION A IS CORRECT.
###Question: 18 month old child presents with both eyes adducted. What is the first thing for diagnosis?
###Options:
A. Examination under anaesthesia
B. Refractive error examination
C. Forced duction testing
D. Fundus examination
