Optive Eye Drops provide long-lasting, soothing relief from the symptoms of dry eyes, such as soreness, irritation or a gritty sensation. Dry eyes can be caused by your eye not producing enough tears to keep the eye moist, or by things such as certain medical conditions or treatments, prolonged use of computer screens or drying atmospheric conditions such as air-conditioning, central heating or atmospheric pollution. Optive Eye Drops are a dual action formula that lubricates the surface of the eye and protects the cornea. The two active ingredients are carmellose sodium, which is an eye lubricant and glycerol, which acts as a non-blurring moisturiser. It also contains the preservative purite, which breaks down into natural tear components in the eye. Optive Eye Drops can be used by people who wear any type of contact lenses.