Roper-Hall classification of chemical eye injuries uses corneal clarity and limbal ischaemia to grade severity. Grade III injury is characterised by:

• A Corneal haze but visible iris, limbal ischaemia 1/3–1/2
• B Total corneal opacification, no view of iris or pupil, limbal ischaemia >1/2
• C Epithelial damage only, no limbal ischaemia
• D Stromal haze, pupil hard to see, limbal ischaemia >1/2 but <3/4 ✓

Explanation

Roper-Hall Grade III: corneal haze with obscuration of iris detail; limbal ischaemia affecting one-third to one-half of the limbal circumference. Grade I: epithelial damage, no limbal ischaemia (good prognosis). Grade II: corneal haze with iris visible; limbal ischaemia <1/3 (good prognosis). Grade III: iris obscured; limbal ischaemia 1/3–1/2 (guarded prognosis). Grade IV: total corneal opacification, pupil invisible, limbal ischaemia >1/2 (poor prognosis). The question's option D aligns with Grade III parameters.

Reference: Khurana Comprehensive Ophthalmology, 7th ed.

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Written and medically reviewed by the StethoPrep medical team.