Previous research comparing high-water hydrogel contact lenses (60-70 per cent water) to lower-water lenses (38 per cent water) has demonstrated greater prevalence of desiccation staining in the high-water lenses.2,3 Water loss from soft contact lenses has been associated with changes in the hydrogel material characteristics including decreased oxygen transmission,4,5 tighter fitting lenses,5,6 change in lens power,7 decreased visual performance,8 and increased surface deposits.5
A unique hydrogel lens polymer
A unique hydrogel contact lens polymer, nesofilcon A (Biotrue Oneday) was developed with the following bio-inspired properties: an outer surface designed to mimic the lipid layer of tear film to prevent dehydration and maintain consistent optics, the same water content as the cornea, 78 per cent, to have a more natural balance of oxygen and water and provide a contact lens option that is biocompatible with the cornea, and the oxygen transmission level the open eye needs to maintain healthy, white eyes.
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