title: A new clinical sign for the diagnosis of allergic conjunctivitis: a brief communication.
abstract: A clinical sign of the lower eyelid to be referred to as the "Mag Sign" or "Crescent Sign" is described, which when present is highly suggestive for conjunctivitides of allergic origin mostly due to aeroallergens (IgE-mediated type I allergic reaction). It is hoped that this sign will facilitate the diagnosis and treatment of allergic conjunctivitis.
mesh_terms: D003233:Conjunctivitis, Allergic / Q000097:blood / Q000175:diagnosis*; D006801:Humans; D007163:Immunosorbent Techniques; D008722:Methods; D012882:Skin Tests; D013666:Tears / Q000276:immunology