(A) Ocular phenotype of >50% of aged (>6 months) Foxq1sb/sb mice: accumulation of debris (arrow) around the eye. (B–I) Histochemical analysis of serial tissue sections of adult murine conjunctiva from Foxq1sb/sb (B, D, F, H) and age-matched wild-type (C, E, G, I) mice. B,C: hematoxylin & eosin; D,E: PAS; F,G: Alcian Blue; H,I: MUC5AC immunostain. All scale bars represent 60 μm.