Clinitas 0.4% is a gentle preservative-free eye drop in easy to use daily re-sealable droppers. Once opened, the cap can be inverted to re-seal the dropper for use throughout the day up to 12 hours. It contains the highest concentration of sodium hyaluronate (0.40% - a naturally occurring product in the eye) available in an eye drop.Each dropper contains approximately 10 drops and comes in packs of 30 making Clinitas 0.4% an economical and very convenient eye drop.Ideal for: Contact lens wearers Dry or sore eyes caused by working at a computer, reading and other close work Watching TV, driving and other activities using concentration (i.e. reduces blink rate) Modern living - air conditioning, heating, air travel and pollution Tired eyes Dry eyes following laser surgery Dry eye sufferers with sensitivity to preservatives Dry or sore eyes associated with the menopause Clinitas 0.4% Multi is the same as Clinitas 0.4% but in a multi-dose, preservative-free bottle.