Hard, flat papillae of the lid conjunctiva are a clinical manifestation of springtime khat conjunctivitis disease, which begins with intense lid conjunctival congestion followed by the development of many hard, flat papillae of varying sizes on the upper lid conjunctiva, resembling paved pebbles. The fissure between the papillae is light blue, and the surface of the papillae appears cloudy like cow’s milk. The secretions are small, sticky, and filamentous, and on smear examination, an increase in eosinophils is seen. If the lower lid conjunctiva is diseased, the papillae are small and few, and less prominent than those of the upper lid conjunctiva. Vernal conjunctivitis is an allergic disease that is highly seasonal and often affects both eyes. It develops in spring and disappears in late fall when it is cold. The disease recurs every year, and in mild cases it does not recur after 3 to 4 years, while in severe cases it can recur continuously for more than 10 years. The disease is characterized by itchy eyes, large, flattened papillae on the lid conjunctiva and colloid hyperplasia of the conjunctiva near the corneal limbus, and secretions with large numbers of eosinophils. Prevention of hard and flat papillae of the lid conjunctiva: 1. Sexual catarrhal conjunctivitis is mainly transmitted through contact with hands, towels, and water. Children are very active by nature, and if no attention is paid to prevention, often a child with the disease quickly spreads the whole family or the entire kindergarten. 2, prevention and control of pediatric acute catarrhal conjunctivitis to strengthen the prevention. Parents try not to take or take their children to densely populated public places, pay attention to the eye hygiene of children. Infected with pink eye, to be properly isolated, do not let the affected children string. 3.Towels, handkerchiefs and basins used by patients with catarrhal conjunctivitis should be disinfected by boiling and dried before use. 4, children pay attention to personal hygiene, do not rub their eyes with dirty hands, cut nails, and wash their hands before and after meals. 5, food should be light, eat more vegetables, fresh fruit, etc., to keep the bowels smooth. 6, with red eyes, do not take something to cover, otherwise eye secretions can not be discharged, will aggravate the disease.