A patient presents with alkali chemical injury to the right eye. Limbal ischaemia involves 240° of the limbal circumference and the cornea is hazy with 50% stromal loss. The anterior chamber is visible. Which Roper-Hall grade is this?
- A Grade III ✓
- B Grade I
- C Grade II
- D Grade IV
Correct answer: A. Grade III
Explanation
Roper-Hall grading of ocular chemical burns: Grade I — no limbal ischaemia, corneal epithelial defect only (good prognosis); Grade II — ischaemia < 1/3 limbus, hazy cornea but iris details visible; Grade III — ischaemia 1/3 to 1/2 limbus, total epithelial loss, stromal haze with iris details obscured; Grade IV — ischaemia > 1/2 limbus, opaque cornea, no iris visible (grave prognosis). Ischaemia of 240° = 2/3 of 360°, and 50% stromal loss with visible anterior chamber is Grade III by BETT/Dua modification.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.