Orbit & Extraocular Muscle Anatomy – Hard MCQs

1. Which structure does NOT pass through the superior orbital fissure?

2. The weakest wall of the orbit is the:

3. Which muscle originates from the anterior part of the orbital floor?

4. The trochlea acts as a pulley for which muscle?

5. All rectus muscles originate from:

6. Primary action of medial rectus muscle:

7. Which nerve supplies the lateral rectus muscle?

8. Levator palpebrae superioris is supplied by:

9. Inferior orbital fissure connects orbit to:

10. Ophthalmic artery is a branch of:

11. A patient cannot abduct his eye. Which muscle is paralyzed?

12. A blow-out fracture commonly traps which muscle?

13. Vertical diplopia worse on looking down stairs suggests damage to:

14. Ptosis with dilated pupil indicates injury to:

15. Infection from ethmoid sinus spreads easily to orbit due to thin:

16. Eye deviated down and out with ptosis – nerve involved?

17. Loss of intorsion indicates paralysis of:

18. Cavernous sinus thrombosis most commonly affects which eye movement?

19. Damage to inferior orbital fissure affects sensation over:

20. Loss of eyelid elevation with preserved eye movements suggests injury to: