Abstract
Purpose :
Globally, the need for cost-effective delivery of corrective lenses for pediatric refractive error is great. The present study aims to assess the global incidence and financial burden of pediatric refractive error via literature review and to design glasses that provide an accessible and affordable avenue to reduce the burden of refractive errors in pediatric patients.
Methods :
The present study involved an investigation into the global need for corrective lenses for astigmatism in resource-poor regions via an extensive literature review. Global prevalence data of refractive error from 1990-2016 WHO regions were extracted and reported as Estimated Pooled Prevalence (EPP). Data on the financial burden of astigmatism was investigated and reported as the United States Dollar (USD) per patient per year. Following the literature review, preliminary designs of cheap, customizable glasses were developed.
Results :
In children, the EPP of myopia, hyperopia, and astigmatism was 11.7% (95% CI: 10.5–13.0), 4.6% (95% CI: 3.9–5.2), and 14.9% (95% CI: 12.7–17.1), respectively. (Hashemi 2018) The highest incidence of refractive errors occurs in Southeast Asia and the Americas. The US average financial burden of uncorrected refractive errors (amblyopia, astigmatism) is approximately $145.92 per patient per year beginning at age 5. Studies have shown that costs tend to increase with time as the severity of the defect increases (Malvankar-Mehta 2018)
The design of the working model is easy to assemble, highly customizable, and affordable. Adjustable straps make the design-friendly to use for those with variable head circumference and anotia. Rotatable lens facilitates adjustment for varied astigmatism axis.
Conclusions :
Childhood visual impairment is a global public health problem associated with significant financial strain, especially in low and middle-income countries. Its most common causes are avoidable with comprehensive vision screening and treatment of common refractive errors. The need for a financially feasible and easily accessible solution warrants further research and design of gadgets such as the Adjustable Eyeglasses.
This is a 2021 ARVO Annual Meeting abstract.