AIM: To find out the rate of the case and the related factors of dry eyes on the in-school adolescent.

METHODS: Totally 2 358 in-school adolescents,(1 768 high school students and 590 junior students)were questionnaired, of whom 856 complained that symptoms existed with their eyes, then a series of examinations and tests such as Slit-lamp examination, tear film break-up time(BUT)measurement, and Schimier test of tear secretion conjunctival fluorescein examination were performed on the patient involved in the survey, the rate of suffering dry eyes and the factors that cause the disease were analyzed and found.

RESULTS: Of the 2 358 adolescents involved in the questionnaire, 157 suffered dry eye syndrome, which covered 6.66% of the total, female(8.08%)and male 5.33%(65), χ²=6.762, P<0.05. There were statistical differences between female and male. Study showed that females were more likely to suffer the disease than males, especially the junior girl students, accounted for 7.64%(64)while junior boy students only 5.48%(51), χ²=3.016, P > 0.05. As for the high school students, statistical differences between high school girls and boys also existed. The rate for girls was 8.08%(28)while boys is 4.82%(14). The total was 7.12%, χ ² = 3.872, P<0.05. However, the comparison between junior boy students and high boy students is the same, χ ² = 0.081, P>0.05. Neither was the comparison between junior girl students and high girl students. Statistics showed long contact with screens, wearing contact lenses too long were the main factors that lead to the dry eyes of the in-school adolescents. Apart from these, there were some other factors, such as long closely reading, using eye drops frequently and systemic diseases related to history etc.

CONCLUSION: The rate of the in-school adolescents suffering dry-eye syndrome is 6.66%.The main factors that cause the in-school adolescents suffer dry-eye syndrome are long contact with screens, wearing contact lenses too long, long closely reading, using eye drops frequently and systemic diseases related to history etc.