Orbit, Lids & Lacrimal MCQs

Ophthalmology · 5 free questions with answers & explanations.

1. A 35-year-old woman presents with bilateral exophthalmos, lid retraction, lid lag on downgaze, and periorbital oedema. She has a history of hyperthyroidism treated with carbimazole. Thyroid function tests are currently normal. The most appropriate first-line investigation to assess orbital involvement is:
2. A 5-year-old boy is brought with a painless, slowly progressive drooping of the right upper lid since birth, with a lid crease that is absent and poor levator function (2 mm). He has to tilt his head backward to see. The most appropriate surgical procedure is:
3. A 50-year-old woman presents with a painful, pulsatile proptosis of the left eye with an audible bruit. She has a history of head trauma three weeks ago. Colour Doppler imaging reveals arterialized blood flow in the superior ophthalmic vein. The most likely diagnosis is:
4. An 8-year-old child presents with acute onset of painful periorbital swelling, proptosis, restricted extraocular movements, and fever. CT orbit shows a subperiosteal collection medial to the right orbit with displacement of the globe laterally and opacification of the ethmoid sinuses. The most likely source of infection and the most critical complication to monitor for is:
5. A 40-year-old woman presents with chronic watery eye (epiphora) and recurrent episodes of mucopurulent discharge from the medial canthus. Regurgitation of mucopus on pressure over the lacrimal sac (positive regurgitation test) is noted. The nasolacrimal duct is found to be blocked. The definitive surgical treatment is: