Refractive Error Study in Young Subjects: Results from A Rural Area in Paraguay
Isabel Signes-Soler, José Luis Hernández-Verdejo, Miguel Angel Estrella Lumeras, Elena Tomás Verduras, and David P. Piñero
International Journal of Ophthalmol
The aim of this study is to evaluate the distribution of refractive error in young subjects in a rural area of Paraguay in the context of an international cooperation campaign for the prevention of blindness.
A sample of 1466 young subjects (ranging from 3 to 22 years old), were examined to assess their distance visual acuity (VA) and refractive error.
An uncorrected distance VA was found in 89.2% of children.
VA <20/25 and/or corneal astigmatism ≥1.50 D was found in 3.9% of children (n=57), with a prevalence of hyperopia of 5.2% (0.2% of the total) in this specific group.
Furthermore, myopia) was found in 37.7% of the refracted children (0.5% of the total). The prevalence of refractive astigmatism was 15.8% (0.6% of the total).
Visual impairment was found in 12/114 (0.4%) of the refracted eyes.
Main causes for VI were refractive error (58%), retinal problems (17%, 2/12), albinism (17%, 2/12) and unknown (8%, 1/12).
The study concluded that a low prevalence of refractive error was found in this rural area of Paraguay, with higher prevalence of myopia than of hyperopia.
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