A new concept of ocular infectious diseases includes two modes of path
ogenesis, one being an acute inflammation caused by the attachment of
free-floating bacteria, and another being intractable biofilm-related
ocular infections. 15-20% of Staphylococcus epidermidis strains isolat
ed from human conjunctiva exhibit slime formation and can be pathogens
causing inflammation. Topical application, in the form of, for exampl
e, eye drops, of a combination of two antimicrobial agents is usually
applied to treat such infections. Any antimicrobial agent having a pos
t-antibiotic effect is generally administered in a twice-a-day regimen
.