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The increasing use of digital devices among adolescents raises concerns regarding eye health, particularly myopia. Non-ergonomic postures, such as using gadgets in a lying position, may increase accommodative stress on the eyes and contribute to visual impairment. To analyze the association between the duration and viewing distance of gadget use in a lying position and the occurrence of myopia among eighth-grade students at SMPN 119 Central Jakarta. An observational analytic study with a cross-sectional design was conducted involving 74 eighth-grade students. Data on gadget use habits, including duration and viewing distance, were collected using a structured questionnaire. Visual acuity was assessed using a Snellen chart. Bivariate analysis was performed using the Chi-square test with a significance level of p < 0.05. Decreased visual acuity was found in 62.2% of respondents. There was no significant association between viewing distance and myopia (p = 0.080). However, a significant association was identified between gadget use duration exceeding two hours per day and the occurrence of myopia (p = 0.002). The duration of gadget use in a lying position was significantly associated with myopia, whereas viewing distance was not. Limiting the duration of gadget use may help prevent visual impairment among adolescents.

Continuous use of gadgets over a long period of time can emit short waves of high energy which can penetrate the eyes and ultimately cause photochemical damage to retinal cells. Excessive use of gadgets will have a negative impact on teenagers, one of which is a decline in eye health. Asthenopia is a disease experienced by the eye because the eye muscles are forced to work hard, especially when they have to look at close objects for a long time. The aim of this research is to determine the relationship between the duration of gadget use and the incidence of eye fatigue (asthenopia) in teenagers at SMAN 1 Garut. The research method used was a quantitative approach with a cross sectional research design. The population in this study was 1374 students and a sample of 94 respondents was obtained using puposive sampling techniques. Data was collected using a gadget usage duration questionnaire and a Visual Fatigue Index (VFI) questionnaire, then the data was analyzed using the Chi Square test. The results of this study show that there is a significant relationship between the duration of gadget use and the incidence of eye fatigue (asthenopia) with a p-value = 0.000 where p <0.05. So it can be concluded that there is a relationship between the duration of gadget use and the incidence of eye fatigue (asthenopia) in teenagers at SMAN 1 Garut. This research is useful as insight that there are negative impacts from excessive use of gadgets, so it is recommended that teenagers apply time limits on gadget use to prevent an increase in the incidence of asthenopia.

This study aims to analyze the relationship between gadget usage and sleep quality among high school students at SMA Pertiwi Medan. Excessive gadget use, especially before bedtime, is often associated with sleep pattern disturbances that can affect students' sleep quality. This research employs a quantitative method with a descriptive correlational approach. Data were collected through questionnaires involving 100 students selected using random sampling techniques. The results show a significant relationship between the duration and frequency of gadget use and students' sleep quality. The higher the intensity of gadget use, the lower the quality of sleep experienced by students. Factors such as usage time, types of activities on gadgets, and sleep duration also influenced the findings. These results provide important implications for students, teachers, and parents to regulate gadget usage

The prevalence of myopia is increasing, especially among students, along with the increasing use of gadgets. This study aims to measure the prevalence of myopia and identify the relationship between the duration of gadget use and the incidence of myopia among students of Ma Chung University Malang in July 2023. This study design uses a quantitative approach with a cross-sectional method, involving 125 students aged 17–24 years who were selected using convenience sampling techniques. The research instruments were questionnaires and direct eye examinations. Data analysis used a simple linear regression test to see the relationship between independent and dependent variables. The results showed that 96.8% of respondents used gadgets for more than 2 hours per day and 58.4% of them experienced symptoms of myopia. Factors such as visual habits and outdoor activities moderate the relationship between the duration of gadget use and the incidence of myopia. This study confirms that unhealthy gadget usage habits increase the risk of myopia. Education is needed regarding good visual habits and increased activity.

The prevalence of myopia is increasing, especially among students, along with the increasing use of gadgets. This study aims to measure the prevalence of myopia and identify the relationship between the duration of gadget use and the incidence of myopia among students of Ma Chung University Malang in July 2023. This study design uses a quantitative approach with a cross-sectional method, involving 125 students aged 17–24 years who were selected using convenience sampling techniques. The research instruments were questionnaires and direct eye examinations. Data analysis used a simple linear regression test to see the relationship between independent and dependent variables. The results showed that 96.8% of respondents used gadgets for more than 2 hours per day and 58.4% of them experienced symptoms of myopia. Factors such as visual habits and outdoor activities moderate the relationship between the duration of gadget use and the incidence of myopia. This study confirms that unhealthy gadget usage habits increase the risk of myopia. Education is needed regarding good visual habits and increased activity.