<prompt> 18 month old child presents with both eyes adducted. What is the first thing for diagnosis?Examination under anaesthesiaRefractive error examinationForced duction testingFundus examination  <response>: Given the age of the child in question, any test has to be performed under anesthesiaEUA, since the child will not cooperate for any examination. During EUA: Refractive error examination is done to rule out hypermetropia as a cause of BL adduction. Force duction test is used for diagnosis of Restrictive strabismus eg Duanes retraction syndrome. 