## Immediate Management of Chemical Eye Injury **Key Point:** The first and most critical step in chemical eye injury is immediate, copious irrigation with normal saline or water to dilute and remove the offending agent and minimize tissue penetration. ### Pathophysiology of Chemical Burns Chemical injuries cause damage through two mechanisms: 1. **Direct chemical toxicity** — the initial burn from the agent itself 2. **Osmotic and pH-related injury** — continued tissue damage from high osmolarity or extreme pH if not diluted Hydrochloric acid (strong acid) causes rapid protein denaturation and corneal opacification. The white, opaque appearance indicates significant epithelial and stromal damage. ### Immediate Management Protocol | Step | Action | Duration/Details | |------|--------|------------------| | **1. Irrigation** | Copious normal saline or water | 15–20 minutes minimum; some guidelines recommend 30 minutes | | **2. pH Assessment** | pH paper to conjunctival fornix | Target: neutral (pH 7–7.4) | | **3. Removal** | Evert lids; remove particulate matter | Use cotton swab if particles visible | | **4. Cycloplegia** | Cyclopentolate 1% or homatropine 5% | Reduces ciliary spasm and pain | | **5. Antibiotics** | Topical (moxifloxacin) + systemic (doxycycline) | Prevents secondary infection | | **6. Anti-inflammatory** | Topical corticosteroids (prednisolone acetate 1%) | Reduces inflammation; use cautiously in severe cases | | **7. Pressure Management** | Aqueous suppressants if IOP elevated | Beta-blockers, carbonic anhydrase inhibitors | **High-Yield:** Irrigation is **time-critical** — delays of even minutes can worsen prognosis. Do not delay irrigation to obtain imaging or arrange transfer. ### Grading of Chemical Injury (Roper Hall Classification) | Grade | Cornea | Conjunctiva | Prognosis | |-------|--------|-------------|----------| | **I** | Clear | Hyperemia, no ischemia | Excellent | | **II** | Hazy, iris visible | Ischemia < 1/3 | Good | | **III** | Opaque, iris obscured | Ischemia 1/3–1/2 | Guarded | | **IV** | Opaque (white) | Ischemia > 1/2 | Poor | This patient has **Grade IV** injury (white opaque cornea, blanched conjunctiva with loss of vascularity indicating extensive ischemia). **Clinical Pearl:** Even in severe Grade IV injuries, immediate aggressive irrigation can limit further damage. The conjunctival blanching indicates ischemia from vascular injury, but this does not contraindicate irrigation — it makes it MORE urgent. ### Why NOT the Other Options - **Anterior chamber paracentesis** — While elevated IOP is a concern in chemical burns, paracentesis is not the first step and may worsen corneal clarity. Aqueous suppressants are first-line for IOP management. - **Topical antibiotics and patching alone** — Deferring irrigation allows continued chemical penetration and osmotic damage; this is dangerous and delays the only intervention proven to limit injury. - **Immediate surgical debridement** — Debridement is reserved for later stages (after initial medical management) and is not the immediate priority. Irrigation comes first. **Mnemonic:** **WIPE** — **W**ash (irrigate), **I**nvestigate (pH), **P**rotect (antibiotics, cycloplegia), **E**valuate (grade injury, refer). [cite:Khurana Comprehensive Ophthalmology 7e Ch 8] 
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