4.3 Article

Peripheral Refraction of Two Myopia Control Contact Lens Models in a Young Myopic Population

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MDPI
DOI: 10.3390/ijerph20021258

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myopia control contact lenses; peripheral refraction; retinal eccentricity

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Peripheral refraction plays a role in the development of myopia. This study compared relative peripheral refraction (RPR) in uncorrected and corrected eyes using two different soft contact lenses (CL) designed for myopia control. The results showed that the RPR was hyperopic with uncorrected and extended depth of focus (EDOF) CL, but became myopic with dual focus (DF) CL. Significant differences were found between RPR curves with both CLs, and there was a relationship between RPR at 30 degrees and myopia level.
Peripheral refraction can lead to the development of myopia. The aim of this study was to compare relative peripheral refraction (RPR) in the same cohort of uncorrected (WCL) and corrected eyes with two different soft contact lenses (CL) designed for myopia control, and to analyze RPR depending on the patient's refraction. A total of 228 myopic eyes (114 healthy adult subjects) (-0.25 D to -10.00 D) were included. Open-field autorefraction was used to measure on- and off- axis refractions when uncorrected and corrected with the two CLs (dual focus (DF) and extended depth of focus (EDOF)). The RPR was measured every 10 degrees out to 30 degrees in a temporal-nasal orientation and analyzed as a component of the power vector (M). The average RPR for all subjects was hyperopic when WCL and when corrected with EDOF CL design, but changed to a myopic RPR when corrected with DF design. Significant differences were found between RPR curves with both CLs in all the eccentricities (Bonferroni correction p < 0.008, except 10 degrees N). An incremental relationship between relative peripheral refraction at 30 degrees and myopia level was found. It is concluded that the two CLs work differently at the periphery in order to achieve myopia control.

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