AGING

Vitamin A deficiency, protein malnutrition. Eyelid abnormalities (e.g. entropion, trichiasis, corneal exposure due to incomplete eyelid closure). Connective tissue disease (RA is most common systemic vasculitic disorder to involve ocular surface!) – see below (peripheral ulcerative keratitis). ... uncommon in USA. Cogan's syndrome (triad ... ................
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