Rosacea, sometimes referred to as acne rosacea, is a chronic dermatologic condition characterized by sebaceous gland dysfunction of the face, neck, and shoulders. Patients may experience vasomotor lability and facial flushing with consumption of alcohol, hot beverages, spicy foods, or other substances. Rhinophyma is a characteristic sign, but may not be present until late in the disease. Ocular manifestations are present in 50% of cases. They include recalcitrant blepharitis, meibomian gland dysfunction, telangiectasia of the eyelid margin, and recurrent chalazia. Longstanding ocular surface inflammation can result in chronic conjunctivitis, episcleritis, iridocyclitis, keratitis, marginal corneal infiltrates, or corneal ulceration. The keratitis associated with rosacea is most commonly inferior, presumably due to the accumulation of inflammatory cytokines in the tear film above the lower lid. It results in the formation of broad, "spade-shaped" pannus with vessels extending into gray or white peripheral stroma, occasionally with subepithelial infiltrates at the leading edge. Findings are usually bilateral, but may be asymmetric.
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