Conjunctival epithelium expression of HLA-DR (human leukocyte antigen-DR) and ICAM-1 (intercellular adhesion molecule-1) have been shown to be correlated with some topical inflammatory processes like allergic conjunctivitis, pterygium, or keratoconjunctivitis sicca (KCS) in cystic fibrosis [2–6]. The gene discussed is ICAM1; the disease is atopic conjunctivitis.