Mcq Subject: Ophthalmology

A 25-year-old lady presents with sudden severe bilateral loss of vision, more so on the right side, with no perception of light. Rest of the examination including pupillary reflexes, fundus and optokinetic nystagmus are normal. She was able to touch the tips of her fingers with her right eye closed but not with her left eye closed. The most like1 tgnosis is:

A. Optic neuritis

B. Anterior ischemic optic neuropathy

C. CMV retinitis

D. Functional vision loss

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Cherry red spot and Hollenhorst plaque are seen in:

A. CRAO

B. CRVO

C. Branch RAO

D. Branch RVO

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Keyhole-shaped visual field defect is seen in lesion involving which of the following regions?

A. Optic disk

B. Optic chiasma

C. Lateral geniculate body

D. Occipital lobe

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Topical administration of I% Pilocarpine failed to produce pupillary constriction in a patient who had a large, dilated pupil What should be the most probable reason?

A. Adie's tonic pupil

B. Diabetic III nerve palsy

C. Pharmacological blockade

D. Uncal herniation

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Most common tumor of lacrimal gland:

A. Trans-scaphoid perilunate fracture

B. Scaphoid fracture

C. Distal radius fracture

D. Hamate fracture

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What is the usual weight of rabbit used in ophthalmological experiments?

A. 0.5-1 kg

B. 1.5-2.5 kg

C. 5-7 kg

D. 10-12 kg

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Concentration of tropicamide:

A. 0.01

B. 0.02

C. 0.03

D. 0.04

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Following endaerectomy on the right common carotid, a patient is found to be blind in the right eye. It is appears that a small thrombus embolized during surgery and lodged in the aery supplying the optic nerve. Which aery would be blocked?

A. Central aery of the retina

B. Infraorbital aery

C. Lacrimal aery

D. Nasociliary aretry

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Secondary glaucoma in early stage of herpes zoster ophthalmlcus occurs due to

A. Trabeculitis

B. Hypersecretion of aqueous humour

C. Haemorrhagic hypopyon

D. lridocyclitis

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The length of the eye ball is

A. 12 mm

B. 16 mm

C. 20 mm

D. 24 mm

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