Plays a critical role in epithelial cell morphogenesis, polarity, adhesion and cytoskeletal organization in the lens (PubMed:26231217). Detected in tricellular junctions. Colocalizes with apical F-actin. Expressed in the developing lens. Deficient mice at 4 weeks postnatal age show reduced lens size and microphthalmia (PubMed:26231217).