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- W2526423120 abstract "Purpose: To assess the peripheral refraction induced by Fractal Contact Lenses (FCLs) in myopic eyes by means of a two-dimensional Relative Peripheral Refractive Error (RPRE) map. Methods: FCLs prototypes were specially manufactured and characterized. This study involved twenty-six myopic subjects ranging from -0.50 D to -7.00 D. The two-dimensional RPRE was measured with an open-field autorefractor by means of tracking targets distributed in a square grid from -30 degrees (deg) nasal to 30 deg temporal and 15 deg superior to -15 deg inferior. Corneal topographies were taken in order to assess correlations between corneal asphericity, lens decentration and RPRE represented in vector components M, J0 and J45. Results: The mean power of the FCLs therapeutic zones was 1.32 +/- 0.28 D. Significant correlations were found between the corneal asphericity and vector components of the RPRE in the nacked eyes. FCLs were decentered a mean of 0.7 +/- 0.19 mm to the temporal cornea. M decreased asymmetrically between nasal and temporal retina after fitting the FCLs with a significant increment of the myopic shift besides 10 deg (p<0.05) and the induced myopic shift at 25 deg and 30 deg decreased with FCLs decentration to temporal cornea. The peak of maximum myopic shift at the peripheral retina (M= -1.3 D) was located at 20 deg. Two-dimensional maps showed uniform significant differences in extreme positions of the visual field in comparison with the horizontal RPRE for M and J0, but not for J45. Conclusions: FCLs measured in myopic eyes showed a similar performance than the reported in previous ray-tracing studies with a small bias explained by the manufacturing process and the lens decentration. Two-dimensional maps are preferable for assessing J45 changes due to the lens." @default.
- W2526423120 created "2016-10-07" @default.
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- W2526423120 date "2016-09-21" @default.
- W2526423120 modified "2023-09-27" @default.
- W2526423120 title "Two-dimensional relative peripheral refractive error induced by Fractal Contact Lenses for myopia control" @default.
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