Practice Orbit & Extraocular Muscles MCQs with Answers—essential ophthalmology Mcq NEET PG, NEXT, AIIMS, and optometrist exams or Ophthalmic Officer exam. Covers extraocular muscle actions, cranial nerve palsies (CN III, IV, VI), orbital anatomy, and key signs like ptosis, esotropia, and diplopia. Ideal for quick revision and concept clarity. Visit Our Index Page to find Topic Wise Ophthalmology mcq.
31. Paralysis of lateral rectus causes:
A. Medial squint (esotropia)
B. Lateral squint
C. Hypertropia
D. Hypotropia
View Answer
A. Medial squint (esotropia) ✅ Exp: Eye pulled medially.
32. Paralysis of superior oblique causes:
A. Vertical diplopia
B. Horizontal diplopia
C. Loss of abduction
D. Ptosis
View Answer
A. Vertical diplopia ✅ Exp: SO palsy → vertical diplopia.
33. Trochlear nerve palsy leads to:
A. Inability to intort
B. Inability to abduct
C. Inability to adduct
D. Inability to elevate
View Answer
A. Inability to intort ✅ Exp: SO palsy → intorsion loss.
34. Abducens nerve palsy leads to:
A. Medial deviation of eye
B. Lateral deviation
C. Vertical deviation
D. Ptosis
View Answer
A. Medial deviation of eye ✅ Exp: LR palsy → esotropia.
35. Oculomotor palsy leads to all EXCEPT:
A. Ptosis
B. Dilated pupil
C. Abduction of eye
D. Loss of elevation
View Answer
C. Abduction of eye ✅ Exp: CN III palsy leaves LR & SO intact → eye abducted & depressed.
36. In primary position, all recti pull eye towards:
A. Posterior pole
B. Anterior pole
C. Lateral side
D. Medial side
View Answer
A. Posterior pole ✅ Exp: Recti contract to pull eye backward.
37. Yoke muscles are:
A. Same eye synergists
B. Contralateral synergists
C. Antagonists
D. Ipsilateral agonists
View Answer
B. Contralateral synergists ✅ Exp: Yoke muscles coordinate binocular movements.
38. Sherrington’s law relates to:
A. Reciprocal innervation of agonist/antagonist
B. Yoke muscles
C. Hering’s law
D. Accommodation
View Answer
A. Reciprocal innervation of agonist/antagonist ✅ Exp: One contracts, antagonist relaxes.
39. Hering’s law relates to:
A. Equal innervation of yoke muscles
B. Reciprocal innervation
C. Retinal correspondence
D. Accommodation
View Answer
A. Equal innervation of yoke muscles ✅ Exp: Both eyes receive equal innervation.
40. Bielschowsky head tilt test is used in diagnosis of:
A. Superior oblique palsy
B. Lateral rectus palsy
C. Oculomotor palsy
D. Ptosis
View Answer
A. Superior oblique palsy ✅ Exp: Head tilt exaggerates SO weakness.
41. Optic canal transmits:
A. Optic nerve + ophthalmic artery
B. Optic nerve + central retinal vein
C. Oculomotor nerve + ophthalmic artery
D. Trochlear nerve + ophthalmic vein
View Answer
A. Optic nerve + ophthalmic artery ✅ Exp: Only optic nerve & ophthalmic artery.
42. Superior orbital fissure lies between:
A. Greater & lesser wings of sphenoid
B. Frontal & maxilla
C. Zygomatic & sphenoid
D. Ethmoid & lacrimal
View Answer
A. Greater & lesser wings of sphenoid ✅ Exp: SOF between greater and lesser sphenoid.
43. Structures passing through superior orbital fissure include all EXCEPT:
A. Oculomotor nerve
B. Trochlear nerve
C. Maxillary nerve
D. Abducens nerve
View Answer
C. Maxillary nerve ✅ Exp: Maxillary nerve passes via foramen rotundum, not SOF.
44. Inferior orbital fissure connects orbit with:
A. Pterygopalatine & infratemporal fossae
B. Middle cranial fossa
C. Posterior cranial fossa
D. Anterior cranial fossa
View Answer
A. Pterygopalatine & infratemporal fossae ✅ Exp: IOF opens into pterygopalatine and infratemporal fossa.
45. Lacrimal fossa is located in:
A. Frontal bone
B. Maxilla
C. Lacrimal bone
D. Zygomatic
View Answer
A. Frontal bone ✅ Exp: Lacrimal gland lies in frontal bone fossa.
46. Pure depressor of eye in abducted position:
A. Superior rectus
B. Inferior rectus
C. Superior oblique
D. Inferior oblique
View Answer
B. Inferior rectus ✅
47. Pure depressor of eye in adducted position:
A. Inferior rectus
B. Superior oblique
C. Superior rectus
D. Inferior oblique
View Answer
B. Superior oblique ✅ Exp: SO depresses adducted eye.
48. Pure elevator of eye in abducted position:
A. Superior rectus
B. Inferior rectus
C. Inferior oblique
D. Superior oblique
View Answer
A. Superior rectus ✅ Exp: SR elevates abducted eye.
49. Pure elevator of eye in adducted position:
A. Superior rectus
B. Inferior oblique
C. Inferior rectus
D. Superior oblique
View Answer
B. Inferior oblique ✅ Exp: IO elevates adducted eye.
50. Which muscle causes abduction in adducted position?
A. Superior oblique
B. Inferior rectus
C. Inferior oblique
D. Superior rectus
View Answer
A. Superior oblique ✅ Exp: SO abducts adducted eye.
51. Levator palpebrae superioris inserts into:
A. Upper tarsal plate
B. Lower tarsal plate
C. Medial canthus
D. Orbital septum
View Answer
A. Upper tarsal plate ✅ Exp: Inserts into upper eyelid.
52. Accessory elevator of upper lid:
A. Muller’s muscle
B. Inferior rectus
C. Superior rectus
D. Orbicularis
View Answer
A. Muller’s muscle ✅ Exp: Sympathetic innervation.
53. Muller’s muscle innervation:
A. Parasympathetic
B. Sympathetic
C. Oculomotor
D. Trochlear
View Answer
B. Sympathetic ✅ Exp: Sympathetic supply from SCG.
54. Paralysis of levator palpebrae superioris →
A. Complete ptosis
B. Partial ptosis
C. Lid retraction
D. Diplopia
View Answer
A. Complete ptosis ✅ Exp: CN III palsy causes complete ptosis.
55. Paralysis of Muller’s muscle →
A. Partial ptosis
B. Complete ptosis
C. Lid lag
D. Blepharospasm
View Answer
A. Partial ptosis ✅ Exp: Sympathetic palsy = mild ptosis (Horner’s).
56. Oculomotor palsy features:
A. Ptosis, dilated pupil, eye down & out
B. Eye abducted only
C. Eye intorted
D. Lid lag only
View Answer
A. Ptosis, dilated pupil, eye down & out ✅ Exp: CN III palsy = “down and out” eye.
57. Trochlear palsy hallmark:
A. Vertical diplopia
B. Horizontal diplopia
C. Convergent strabismus
D. Ptosis
View Answer
A. Vertical diplopia ✅ Exp: SO palsy → vertical diplopia.
58. Abducens palsy hallmark:
A. Esotropia
B. Exotropia
C. Hypertropia
D. Hypotropia
View Answer
A. Esotropia ✅ Exp: LR palsy → medial deviation.
59. Which nerve palsy worsens on looking down stairs?
A. Oculomotor
B. Trochlear
C. Abducens
D. Trigeminal
View Answer
B. Trochlear ✅ Exp: SO palsy → difficulty in downgaze
60. Isolated pupil involvement is most typical of:
A. Oculomotor nerve palsy
B. Trochlear palsy
C. Abducens palsy
D. Horner’s syndrome
View Answer
A. Oculomotor nerve palsy ✅ Exp: CN III palsy → dilated fixed pupil.
Understanding the anatomy and innervation of the extraocular muscles and orbital structures is crucial not only for cracking exams like NEET PG, NEXT, AIIMS, MRCS Ed, and Optometry/Ophthalmic Officer tests but also for diagnosing and managing real cases like diplopia, ptosis, and cranial nerve palsies.
Use these high-yield Ophthalmology mcq as a quick revision tool to Clarify your clinical concepts and sharpen your problem-solving skills in ophthalmology.
