The impact of wearing single vision soft contact lenses on the peripheral refractive error

Kareem Allinjawi,Saadah Mohamed Akhir,Haliza Abdul Mutalib,Sharanjeet-Kaur Sharanjeet-Kaur

doi:10.12688/f1000research.10080.1

Abstract

Aim: The purpose of this study was to determine the changes in the relative peripheral refractive error produced by soft single vision contact lenses in myopic schoolchildren. Methods: 27 myopic schoolchildren aged between 13 to 15 years were included in this study. The measurements of central and peripheral refraction were made only on the right eye using a Grand-Seiko WR-5100K open-field autorefractometer without contact lens (WL), and with wearing single vision contact lens (SVCL). Refractive power was measured at center and horizontal eccentricity between 35° temporal to 35° nasal visual field (in 5° steps). Results: SVCL showed an increase in peripheral hyperopic defocus at the nasal and temporal visual field compare with baseline, but this change was not statistically significant (p=0.129). Conclusion: Wearing single vision soft contact lenses increases the relative peripheral hyperopic defocus in myopic schoolchildren.

Highlights

Myopia is the most common type of refractive errors[1]
The statistical significant difference started from 20o and beyond in nasal and temporal visual field (VF) when using the single vision contact lens (p
We evaluated the relative peripheral refractive error along the horizontal meridian

Summary

Introduction

Myopia is the most common type of refractive errors[1]. It is considered a global health problem. Studies have shown that the myopic eye has a more prolated retinal shape compared to emmetropes[2,3,4]. Soft contact lenses are commonly used to correct refractive errors especially in young adults. Using these lenses has become the most widely affordable correction of myopia with an extensive range of power and designs available, and such lenses are frequently worn by myopic children and adults. The contact lens usually affords a wider visual field, better life-style, and better appearance compare with spectacles. The incidence rate of microbial keratitis infection ranges from 2.2 to 4.1/10,000 per year for users of ‘daily-wear soft contact lenses, and this rate increases for users of extended-wear soft contact lenses from 13.3 to 20.9/10,000 per year[5]

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