On slit-lamp examination of a 22-year-old with progressive myopia, you notice a conical protrusion of the cornea, Fleischer ring at the base of the cone, and Vogt striae. Which condition does this describe?
- A Corneal ectasia post-LASIK
- B Keratoconus ✓
- C Pellucid marginal degeneration
- D Terrien marginal degeneration
Correct answer: B. Keratoconus
Explanation
Keratoconus is a non-inflammatory ectatic condition characterised by progressive thinning and conical protrusion of the central/paracentral cornea. Fleischer ring (iron deposit at the base of the cone due to haemosiderin), Vogt striae (fine vertical lines in deep stroma due to stress), and Munson sign (V-shaped indentation of lower lid on downgaze) are classical signs. Rigid contact lenses or corneal collagen cross-linking are mainstays of management.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.