Short-Term Effect of Wearing of Extended Depth-of-Focus Contact Lenses in Myopic Children: A Pilot Study

Gema Corpus,David P Piñero

doi:10.3390/app12010431

Abstract

This pseudo-experimental, prospective, and longitudinal pilot study was conducted to characterize the optical and visual changes occurring in the short-term wear of a hydrophilic contact lens (CL) based on extended focus technology (EDOF). A total of 30 eyes of 15 children (age, 6–16 years) were fitted with the EDOF CL Mylo (Mark’ennovy Care SL), performing an exhaustive follow-up for one month evaluating changes in visual acuity (VA), accommodation, binocularity, ocular aberrometry, visual quality, pupillometry, keratometry and biometry. Far and near VA with the CL improved progressively (p < 0.001), obtaining mean final binocular values of −0.08 ± 0.01 and −0.07 ± 0.01 LogMAR, respectively. There was a mean reduction in the accommodative LAG of 0.30 D (p < 0.001), without associated alterations in the magnitude of the phoria and fusional vergences (p ≥ 0.066). A controlled but statistically significant increase (p ≤ 0.005) of ocular high order aberration (HOA) root mean square (RMS), primary coma RMS, primary spherical aberration Zernike term and secondary astigmatism RMS was found with the CL wear. In conclusion, the EDOF CL evaluated provides adequate visual acuity and quality, with associated increased of several HOAs and a trend to reduction in the accommodative LAG that should be confirmed in future studies.

Highlights

Myopia is the refractive defect in which light rays that enter the eye parallel to the optic axis focus in front of the retina in the unaccommodated eye [1]
The aim of the current study was to characterize the optical and visual changes occurring in the short term with the extended depth of focus (EDOF) contact lens (CL) Mylo, which has been already demonstrated to be efficacious for myopia control in children in the long term
Significant improvements were detected in all visual acuity (VA) measured at 15 and 30 days of CL wear compared to the baseline value (p ≤ 0.042) (Table 2)

Summary

Introduction

Myopia is the refractive defect in which light rays that enter the eye parallel to the optic axis focus in front of the retina in the unaccommodated eye [1] This refractive defect induces a blur that can be optically compensated using glasses, contact lenses or through refractive surgery [2]. This increase could be due to the existence of certain factors such as geographical, genetic or environmental factors that contribute to both the onset and progression of myopia For this reason, in recent years, a multitude of therapeutic strategies have been investigated to control the progression of myopia and to improve the visual health of the pediatric population. The optical aids for myopia control are focused on the control of the off-axis or peripheral hyperopic defocus that has shown to be instrumental in the axial elongation of the ocular globe [9,10,11]

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Conclusion