AIM: To explore the influence of electronic products on myopia in preschool and school aged children, and the development regularities of myopia, to formulate reasonable guidelines for using eyes healthily, and lay a solid foundation for the prevention and control work.

METHODS: This retrospective analysis enrolled 900 3～12 years old children from outpatients department, and all of them were established individualized archives, recording: uncorrected visual acuity, optometry, slit lamp, ophthalmoscopy, strabismus inspection results; recording eye usage condition on TVs, computers, mobile phones, iPad, homework, extra-curricular books. Statistical analyze the refractive status of each age group, the use of electronic products of different age groups and their correlation with refractive status.

RESULTS: The number of preschool children with normal uncorrected visual acuity was more than that of early school-age children, and the difference was statistically significant(P<0.05); the numbers of preschool children with abnormal visual acuity were different at various age groups and the differences were not statistically significant(P>0.05); the number of children aged 7～12(early school aged children)with myopia was more than that of children aged 3～6(preschool children)and the difference was statistically significant(P<0.05). The stacking usage of electronic products in 6 and 10 years old children was the most. Logistic regression model showed that the time for playing phone, computer and iPad were risk factors for the occurrence of myopia.

CONCLUSION: For preschool children, it is necessary to conduct early screening, health guidance, the establishment of personalized medical records and one-to-one personalized guidance; it is also needed to avoid the arduous learning task with the stacking usage of eyes, to fight for myopia and to control the development of myopia. Therefore, to reduce the use of electronic products has become a topic worthy of further study.