With the popularization of home computers and the increase of TV viewing time, some elderly people often have dry eyes, but there are also a considerable number of elderly people because of “tears” and trouble. Older people often complain that “tears” are like “ghosts” that come and go. When they go out for a morning walk, they are instantly “full of tears”; when they read or talk, they are “full of tears” for no reason; when they ride a bike, they are suddenly “teary-eyed” and have a lot of danger. Some elderly people keep wiping their eyes due to repeated tearing, which eventually leads to red, swollen, painful and even erosion of the eyelids. In order to eliminate the symptoms of tears, some elderly friends purchased a variety of eye drops, including hormonal eye drugs, the results are not ideal; some elderly friends more than the doctor, must “find a statement”; some elderly friends even suspect that the eyes suffer from incurable diseases, will be blind, every day anxiety. In fact, these worries and fears are not necessary.