Percentage of studies reporting incidence of lens contamination by species. CNS, coagulase-negative Staphylococci; Prop, Propionibacterium sp; Cor, Corynebacteria sp; SA, Staphylococcus aureus; Strep V, Streptococcus viridans; Strep P, Streptococcus pneumoniae; Micro, Micrococcus; Bac, Bacillus; Fungi, yeast/fungi; Serr, Serratia sp; Pseud, Pseudomonas sp; GmNeg, Other Gram−.