 One way to alleviate hypoxia is to increase the amount of oxygen transmitted to the cornea.Although silicone-hydrogel lenses almost eliminate hypoxia in patients due to their very high levels of oxygen transmissibility, they also seem to provide a more efficient platform for bacterial contamination and corneal infiltration than other conventional hydrogel soft contact lenses.A recent study showed that "Pseudomonas aeruginosa" and "Staphylococcus epidermis" adhere much more strongly to unworn silicone hydrogel contact lenses than conventional hydrogel lenses and that adhesion of "Pseudomonas aeruginosa" was 20 times stronger than that of "Staphylococcus epidermidis".