A 68-year-old woman presents with sudden painless loss of vision. Fundus examination confirms central retinal artery occlusion. Which additional investigation is mandatory before discharge?
- A Serum ESR and CRP to exclude giant cell arteritis ✓
- B Serum homocysteine level alone
- C Intraocular pressure measurement alone
- D Visual field testing with Humphrey 24-2
Correct answer: A. Serum ESR and CRP to exclude giant cell arteritis
Explanation
Giant cell arteritis is an important cause of central retinal artery occlusion in patients above 55 years, and the fellow eye can be lost rapidly if systemic corticosteroids are delayed. ESR, CRP and platelet count are therefore part of the mandatory workup in this age group. Intraocular pressure and visual fields are useful baseline tests but they do not identify the life-threatening vasculitic cause, which is why option A is the required investigation.
Reference: AAO Basic and Clinical Science Course, Section 12: Retina, 2023-2024 ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.