Myopia Progression in Children Wearing Spectacles vs. Switching to Contact Lenses

Marsh‐Tootle, Wendy; Dong, Li; Hyman, Leslie; Gwiazda, Jane; Weise, Katherine K.; Dias, Lynette; Fern, Karen D.

doi:10.1097/opx.0b013e3181a6a250

Cited by 22 publications

(19 citation statements)

References 9 publications

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“…Studies of the effects of soft contact lenses on the progression of myopia have reported no effect on refractive development 40, 41 or small but clinically insignificant effects. 42 Studies using rigid contact lenses have reported slowing of myopia progression 43, 44 or no effect 45 or an increase the progression of myopia. 46 The recent CLAMP (Contact Lens and Myopia Progression) study found that RGP lenses reduced the rate of progression of myopia in children, but this was largely due to flattening of the cornea rather than slowing of axial elongation.…”

Section: Control Of Eye Growthmentioning

confidence: 99%

Peripheral Refraction With and Without Contact Lens Correction

Shen¹,

Clark²,

Soni³

et al. 2010

Optometry and Vision Science

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Purpose Peripheral refractive error degrades the quality of retinal images and has been hypothesized to be a stimulus for the development of refractive error. The purpose of this study was to investigate the changes in refractive error across the horizontal visual field produced by contact lenses (CLs) and to quantify the effect of CLs on peripheral image blur. Methods A commercial Shack-Hartmann aberrometer measured ocular wavefront aberrations in 5° steps across the central 60° of visual field along the horizontal meridian before and after CLs correction. Wavefront refractions for peripheral lines-of-sight were based on the full elliptical pupil encountered in peripheral measurements. Curvature of field is the change in peripheral spherical equivalent relative to the eye’s optical axis. Results Hyperopic curvature of field in the naked eye increases with increasing amounts central myopic refractive error as predicted by Atchison (2006). For an eccentricity of E degrees, field curvature is approximately E percent of foveal refractive error. Rigid gas permeable (RGP) lenses changed field curvature in the myopic direction twice as much as soft contact lenses (SCLs). Both of these effects varied with CLs power. For all lens powers, SCL cut the degree of hyperopic field curvature in half whereas RGP lenses nearly eliminated field curvature. The benefit of reduced field curvature was partially offset by increased oblique astigmatism. The net reduction of retinal blur due to CLs is approximately constant across the visual field. Conclusions Both SCL and RGP lenses reduced the degree of hyperopic field curvature present in myopic eyes, with RGP lenses having greater effect. The tradeoff between field curvature and off-axis astigmatism with RGP lenses may limit their effectiveness for control of myopia progression. These results suggest that axial growth mechanisms that depend on retinal image quality will be affected more by RGP than by SCL lenses.

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Section: Control Of Eye Growthmentioning

confidence: 99%

Peripheral Refraction With and Without Contact Lens Correction

Shen¹,

Clark²,

Soni³

et al. 2010

Optometry and Vision Science

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show abstract

“…Some studies [5][6][7] have established a greater progression in subjects who wear SCL than in those who wear glasses, but other studies [8][9][10] have not to spectacles. A more recent work by Marsh-Tootle et al (2009) [11] has established that children switching from glasses to SCL experienced a small statistically significant but clinically inconsequential increase in myopia progression.…”

Section: Introductionmentioning

confidence: 97%

Contact lenses vs spectacles in myopes: is there any difference in accommodative and binocular function?

Jiménez

Martínez-Almeida

Salas

et al. 2010

Graefes Arch Clin Exp Ophthalmol

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The results found in this study show a definite trend towards poorer accommodative and vergence function with the use of contact lenses in comparison to glasses. This downward trend, though not statistically significant in accommodative function (lower PRA values and less lens amplitude of accommodation) might suggest that temporal insufficiency in the accommodation process could be occurring while contact lenses are used, thereby possibly creating a lag in accommodation to reduce associated overconvergence. This would be manifested in more esophoric values being found in the vergence function. The higher accommodative lags found in this study with SCL could indicate that prolonged use of SCL in near tasks may provoke a continuous hyperopic retinal defocus, a risk factor for the onset and progression of myopia, as indicated in numerous studies.

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“…29 -31 Myopia management, whether with spectacles or contact lenses, has been naturally directed toward the pediatric population and is especially popular in Asian cultures with their high prevalence of myopia. 32,33 Recent research in myopia development suggests that peripheral myopic defocus may slow the progression of myopia in the developing eye in both animal and human models. 34 -37 If peripheral defocus technology is to be applied to SCLs, it is important to fully characterize and understand the risk for SCL-associated complications and to understand the types of events that interrupt lens wear in children and teenagers.…”

mentioning

confidence: 99%