Product Description Hycosan Extra Dry Eye Drops are the ideal solution to persistently dry and irritated eyes. Containing 0. 2% hyaluronic acid, this intensely hydrating eye drop will provide immediate and lasting relief to dry and tired eyes. These drops are especially well suited to those with sensitive eyes as this product is preservative free. These drops can be used daily, as and when needed. You can also use this product with or without contact lenses. Compared to other eye drops, these are longer lasting as they can be used for up to 6 months after opening. Need more optical advice help? Ask our optical experts