FCER1A and conjunctivitis: Strikingly, ocular OVA challenges (MC903 + OVA/OVA) led to a trend of further increased basophil frequency (Figure 3A) and upregulation of FcεRIα and IgE compared with control mice (Figure 3B), suggesting that conjunctivitis-associated blood basophils are more responsive to IgE-mediated stimulation.