For example, P. aeruginosa binds to FN via OprQ72 and S. epidermidis binds to FN via Embp.18,19 The site in FN that P. aeruginosa binds to is not known, but S. epidermidis binds to the HepII domain of FN, suggesting that, in principle, HS and HP may also inhibit S. epidermidis keratitis. Here, FN1 is linked to keratitis.