Hycosan Hycosan is a convenient, long lasting eye drop formula that provides daily eye comfort & alleviates mild to moderate dry eye symptoms. It can also be used post-surgery & the preservative free formula can be used with both hard & soft contact lenses. Hycosan contains high quality, 0.1% sodium hyaluronate to create a viscous eye drop for a long lasting effect that does not cause blurring of vision, a common problem with many viscous eye drops. Hycosan uses the unique, patented COMOD system to deliver a preservative free eye drop that is sterile for 6 months after first opening. This also ensures that just a single calibrated drop is dispensed per click to ensure accurate dosing & less wastage.