My father aged 69 years having watering of both eyes on and off for a month. He had previous episode three weeks ago lasting for a week and stopped without any medication .After 3-4 weeks it recurs again ,he has cataract in lt eye since 6 years and not operated, has been operated for rt eye cataract before 6 yrs. Is it due to cataract or some other reason. It is worrying.