Background : According to the Japanese epidemiologic survey: 3343 students, of whom 2848 were boys and 585 were girls, 123 cases (4.3%) of boys and 47 cases (8.0%) of girls were clinically diagnosed with dry eye, and 599 cases (21.0%) of boys and 143 cases (24.4%) of girls were diagnosed with dry eye symptoms; there is a lack of data in China but the incidence rate is likely to be higher. Causes : ● Congenital disorders ● Autoimmune and inflammatory disorders ● Allergic conjunctivitis ● Environmental factors (dry air, decreased transient vision, too many video screens, toys and pets, etc.) Diagnosis : Clinical manifestations : ● Chronic, recurrent redness of the eyes, tearing, photophobia, blepharospasm, and other systemic manifestations. ● Frequent blinking (most commonly associated with dry eye, allergies, and other eye diseases) ● History >2 times per year Persistent redness in both eyes for more than a week Highly suspicious for dry eye. Treatment: Artificial tears Currently, the main varieties on the market are New Tears and Siren. Prevention: ● Remove triggers and improve the environment ● Pay attention to the toxicity of medications: antivirals, aminoglycoside antibiotics, NSAIDs, etc. ● Preservatives, additives, and other medications. ● Preservatives, additives, drug abuse, ● Avoid open air conditioning and poor air circulation. ● Improve air dryness ● Pay attention to home decoration home ● Pay attention to children’s toys and pets