MIF and atopic conjunctivitis: In the present study, we used MIF knockout (KO), MIF transgenic (Tg), and wild-type (WT) C57BL/6 mice to assess the potential role of MIF in the pathogenesis of allergic conjunctivitis and pollen dermatitis sensitized by RW or JC pollen, and challenged mice via pollen-containing eye drops applied on the eye and the eyelid.