<prompt> Ischemic necrosis in alkali burn is ?Stage IStage IIStage IIIStage IV  <response>: Ans. is a i.e., Stage I Alkali burns are among the most severe chemical injuries to eye. Common alkalies responsible for burns are liquid ammonia most harmful, lime, caustic potash or caustic soda. o Clinical features are divided into three stages. 1 Acute ischemic necrosis Stage I :- In this stage there are signs in conjunctiva edema, congestion, necrosis, copious discharge, cornea sloughing, edema and opacity and iris iridocyclitis. 2 Reparation Stage II :- Conjunctival and corneal epithelium regenerate, and there is corneal neovascularization. 3 Complications Stage III :- Symblepharon, recurrent corneal ulceration, complicated cataract, secondary glaucoma. 