What is the most appropriate test for him?

33-year-old female complains of diplopia on upright gaze. Exam: ptosis can be seen. There are no other co significant Past medical history.

What is the most appropriate test for him?
A . Ophthalmoscopy
B . Checking red reflex
C . Thyroid function test
D . Visual field test

Answer: B

Explanation:

This is a wrong key. Right key should be D. CT. A case of 3rd nerve palsy. So to cause CT should be done. Red reflex is seen to diagnose cataract.