HYLO DUAL should be used according to the instructions given by the doctor. Generally adults and children 6 years and older instil one drop of HYLO DUAL three times a day into the conjunctival sac of each eye. If the patient apply HYLO DUAL more frequently (e.g. more than 10 times per day) or suffer from more severe complaints the patient should consult an ophthalmologist in regular intervals. HYLO DUAL is suitable for long-term treatment. However - as in all persisting symptoms - the patient should consult the ophthalmologist if the complaints do not improve e. g. within two weeks.