Related Experiment Video
Updated: Aug 5, 2026
07:06
Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
Published on: March 29, 2022
Modifiable behavioral factors associated with myopia among school-aged children
Min Lin1, Xiaodi Tang1, Peng Lei2
1Department of Ophthalmology, The Affiliated Guangdong Second Provincial General Hospital of Jinan University, No. 466 Xingang Middle Road, Haizhu District, Guangzhou 510317, Guangdong, China.
Postgraduate Medical Journal
|July 29, 2026
Summary
Maintaining proper near-work distance and increasing outdoor time can help prevent myopia in children. Limiting homework duration and ensuring adequate eye-to-screen/book distances are key behavioral factors for myopia prevention.
Area of Science:
- Ophthalmology
- Pediatrics
- Public Health
Background:
- Myopia prevalence is increasing globally among school-aged children.
- Behavioral factors are suspected contributors to myopia development.
- Specific visual habits and their association with myopia require further investigation.
Purpose of the Study:
- To investigate the association between specific behavioral factors and myopia in school-aged children.
- To identify modifiable risk factors for myopia prevention strategies.
Main Methods:
- Cross-sectional study involving 4957 school children in Guangzhou.
- Data collected via physical examination records and parent questionnaires.
- Statistical analyses included LASSO regression, univariate, and multivariate logistic regression.
Main Results:
- Homework time of 2-4 hours daily was linked to increased myopia odds (OR=1.24).
- Adequate eye-to-screen distance (≥30 cm) and eye-to-book distance (≥30 cm) were associated with lower myopia odds.
- Daily outdoor activity exceeding 30 minutes was also linked to reduced myopia risk (OR=0.87).
Conclusions:
- Modifiable behaviors like maintaining near-work distance, limiting homework, and increasing outdoor activity are associated with lower myopia risk.
- These findings support school- and family-based interventions for myopia prevention.
- Further longitudinal and interventional studies are recommended to inform guidelines.
Related Concept Videos
01:30Attention-Deficit/Hyperactivity Disorder
Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
Diagnostic Criteria and Symptoms
To diagnose ADHD, symptoms must manifest before age 12 and be evident across multiple settings.
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
01:22Photoreceptors and Visual Pathways
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
01:28Conduct Disorder
Conduct disorder is a complex mental health diagnosis characterized by a repetitive and persistent pattern of behavior that violates societal norms, the rights of others, or age-appropriate rules. The diagnostic criteria for conduct disorder require the presence of at least three problematic behaviors within the past 12 months, with at least one occurring in the past six months. These behaviors are grouped into four categories: aggression toward people and animals; destruction of property;...