extreme® H2O 54% 14.2 is the lens of choice for any patient wishing to improve the end of day comfort.The lenses have a dia. of 14.2 mmm. Our lenses have unique water binding properties allowing them to retain virtually all water content through the entire wearing period. H2O lenses are a great upgrade for patients who may still be wearing traditional disposable lenses, or have failed in silicone hydrogels.