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Pediatría (Asunción)

versão On-line ISSN 1683-9803


FERREIRA MARTINEZ, Jessica  e  CARDOZO, Olivia. Alteration of Vision and its relationship with the use of electronic devices in adolescents attending public schools in San Lorenzo. Pediatr. (Asunción) [online]. 2019, vol.46, n.3, pp.173-178. ISSN 1683-9803.


Uncorrected refractive errors are the main cause of visual impairment. In places where ophthalmological care is poor, screening programs have been carried out by teachers, which were efficient for early detection of refractive errors.


To determine the frequency of vision impairment and its relationship with the use of electronic devices in adolescents of two schools in San Lorenzo.

Materials and Methods:

This was an observational and descriptive study, with an analytical component. Teenagers from 12 to 18 years old from two schools in San Lorenzo were included. The variables studied were: Age, Sex, vision less than 20/40, prior consultation history, family history of wearing glasses, electronic device usage hours, use of social networks, hours spent outdoors, time spent on leisure reading, presence of eye symptoms. Statistical analysis: SPSSv21 using descriptive and inferential statistics. Protocol approved by the institutional ethics committee with informed consent.


300 adolescents were evaluated, the median age was 14 years, female sex was more prevalent (58.7%); 7.3% presented with vision impairment, 64.3% had not consulted previously. A family history of wearing glasses was not significant. It was noted that the daily hours of use of electronic devices were greater in those with reduced vision with less time spent outdoors in those with impaired vision. The most frequent diagnosis was astigmatism.


The frequency of vision impairment in adolescents was 7.3%. Adolescents with impaired vision had more daily hours of using electronic devices, and less hours spent outdoors.

Palavras-chave : Visión; electronic devices; refraction errors.

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