Thealoz Duo is a solution that is given to the eye or contact lenses. The Thealoz Duo may be used on the eye when discomfort, stinging or irritation occurs. The above symptoms can be caused by external factors such as air, pollution, smoke, dust or cold conditions, long hours of work in front of a computer screen, heat, air conditioning, air travel. Thealoz Duo does not contain preservatives, which helps to provide high levels of tolerance to the eye. This solution can be used by people wearing contact lenses offering instant comfort that lasts all day.