Hycosan Extra, Plus or Original Eye Drops For Dry Eyes Hycosan Extra - Convenient and extra long lasting eye drops that provide daily comfort for more severe cases of dry eye - Safe for use with all types of contact lenses - Preservative free and remains sterile for 6 months after opening - Can be used for 6 months after opening - Useful in more severe and persistent cases of dry eye as well as after surgery Hycosan Plus - For lubrication that can support the healing of a damaged eye surface from dry eye or surgical procedures - Suitable for use with both soft and hard contact lenses - Preservative free and remains sterile for 6 months after opening - Preservative free - Can be used for 6 months after opening Hycosan Original - To improve the lubrication of the eye surface in eyes that are dry, burning or uncomfortable - Suitable for the use with all contact lenses - Preservative free and remains sterile for 6 months after opening - Preservative free - Remains sterile for 6 months after opening