Ocular surface of patients (P) with LSCD. No CK7 (FITC, green) was present in the unaffected corneas. CK7 was expressed by normal conjunctiva as well as conjunctival cells that overgrew the corneas of the LSCD eyes. Indirect fluorescence immunocytochemistry was performed on the membranes, and nuclei were counterstained with propidium iodide (red). RE, right eye; LE, left eye. Scale bar, 10 μm.