Refractive Error Study in Children: results from Shunyi District, China

Area of Science:

• Ophthalmology
• Public Health
• Pediatric Optometry

Background:

• Refractive errors and vision impairment are common in school-aged populations.
• Understanding the prevalence and causes of these conditions is crucial for developing effective interventions.

Purpose of the Study:

• To determine the prevalence of refractive errors and vision impairment in school-aged children.
• To identify the primary causes of vision impairment in this demographic.
• To analyze the age- and sex-specific prevalence of myopia and hyperopia.

Main Methods:

• A cluster-based random sampling method was employed to select participants aged 5 to 15 years in Shunyi District, Beijing.
• Comprehensive ophthalmic examinations, including visual acuity testing and cycloplegic refraction, were performed on 5,884 children.
• Quality assurance measures included independent replicate measurements for a subset of children.

Main Results:

• The prevalence of best visual acuity worse than 0.5 (20/40) in at least one eye was 1.8%, with 0.4% having bilateral impairment.
• Refractive errors accounted for 89.5% of vision reduction, with myopia being the most prevalent.
• Myopia prevalence increased significantly with age, reaching 36.7% in males and 55.0% in females by age 15, while hyperopia decreased.

Conclusions:

• Reduced vision due to myopia represents a substantial public health challenge among school-aged children in Shunyi District.
• Approximately 9% of children could benefit from corrective lenses, emphasizing the need for accessible vision services.
• Further research is recommended to track the long-term trends of myopia and its potential changes in recent birth cohorts.