A Study on the Design of Vision Protection Products Based on Children’s Visual Fatigue under Online Learning Scenarios

Abstract

The rate of myopia in children is increasing rapidly under online learning scenarios. One of the important reasons for this is incorrect reading and writing posture. Three screen view parameters (viewing angle, viewing height, and viewing distance) are selected as significant influencing factors and blink rating is used as a sign of visual fatigue through literature analysis to study the influence factors of myopia in children, and their correlation. Children’s visual fatigue is evaluated by subjective evaluation and is recording using an eye tracker for changes in the three factors through online learning scenario simulation experiment. An optimal regression model is constructed that illustrates the relationship between the three variables and the visual fatigue levels. The aim of this study is to confirm the quantitative relationship between the screen view parameters and visual fatigue, and to design a child vision protection product on this basis. The test results show there is a linear positive correlation between the viewing angle, viewing height, and viewing distance. A vision protection device has been designed based on this model and was verified through function prototype testing. The result of this study quantified the relationship among screen view parameters and children’s visual fatigue, which provides a theoretical basis for the design of a children’s visual protection device.

Algorithmic and sensor-based research on Chinese children’s and adolescents’ screen use behavior and light environment

“…Specifically, elementary, middle, and high school students, who spent more time on screens, exhibited significantly higher blinking rates than preschool and infant groups with shorter screen exposure. These findings align with those of Feng et al ( 3 ), suggesting that the intensity of daily near work was greater for elementary, middle, and high school students. However, during the initial hour of screen time, the blinking rate in each age group fluctuated only slightly, with no statistically significant differences.…”

“…The incidence of dry eye syndrome in children has reached 50–60%, and its symptoms include dry eyes, foreign body sensation, tears, blurred vision, headache, esotropia, and abnormal vision. A study of 52 children in grades 3–4 revealed that the level of asthenopia was lowest when the screen was approximately 50 cm from the eyes ( 3 ). Reid et al ( 25 ) proposed that children and adolescents follow the 20–20-20 principle while using digital products: rest and look at an object 20 feet away for 20 s after using the devices for 20 min.…”

“…Decreased blinking rates, increased tear evaporation, and aggravation of dry eye symptoms are significant contributors to asthenopia when individuals focus on screens. An investigation involving children in grades 3 and 4 revealed that blinking rates increased after an average of 15 min of tablet usage and were positively correlated with the duration of screen time ( 3 ). This study also identified notable differences in blinking rates among various age groups.…”

“…For instance, traditional forms of work, learning, social communication, and entertainment are being replaced by telecommuting, remote courses, cyber communication, and online entertainment, respectively. The use of digital devices is efficient and convenient; however, it prolongs near work and screen time, leading to video display terminal syndrome (or computer vision syndrome) ( 1 – 3 ).…”

Intelligent Health Assistant for Pupils

“…The sensor is tilted away from the table at an angle of 28.35 degrees (tại sao). When the user is using the device, the system will sound an auditory warning when the distance between the user's head and the sensor is less than 30cm [29], urging them to return to the proper posture. The system is then equipped with a fine dust sensor, model number GP2Y1010AU0F [30], to track the level of fine dust in the user's learning environment.…”