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Nicola S Logan, Bernard Gilmartin; Asymmetry in peripheral refraction profile in children and young adults. Invest. Ophthalmol. Vis. Sci. 2018;59(9):2150. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate symmetry of relative peripheral refraction (RPR) in children and young adults with myopia
Participants were 25 young adults (age 18 to 25 years) with myopia (-0.50 to -6.00D) and 25 children (age 7 to 12 years) with myopia (-0.50D to -5.50D). Central and peripheral refraction were measured using autorefraction under cycloplegia (Grand Seiko WAM, 1% tropicamide). Peripheral refraction were measured along 10°, 20° and 30° from central fixation in both nasal and temporal fields. RPR was determined by subtracting the central measurement from each peripheral measurement.
The spherical equivalent peripheral refractive error in all subjects showed a similar pattern with the nasal retina exhibiting a higher level of relative peripheral hyperopia than the temporal retina (p<0.02). Mean nasal temporal asymmetry was 2.49 SD 1.50D for the child group, and 1.53 SD 1.21 for the young adult group. The nasal temporal asymmetry was significantly greater in the child group than the young adult (p<0.01).
RPR profiles were different among the child and young adult groups. Significant variability in asymmetry in peripheral defocus profile is demonstrated in the child cohort in this study. If myopia progression is reduced with imposed relative peripheral myopic defocus, the findings from the current study suggest that imposing an asymmetric relative myopic defocus profile may have implications in myopia control.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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