Visual Performance with Lenses Correcting Peripheral Refractive Errors

Abstract

It is possible to design and manufacture lenses to give near-optimum peripheral visual performance to at least ±30° along one visual field meridian. The benefit of such lenses is likely to be manifest only if a subject has a considerable relative peripheral refraction, for example, of the order of 2 D.

Table of Contents

“…A meridional effect for detection in monochromatic light was found in the present study as well as in the study by Atchison et al, 25 both using Gaussian windowed gratings. A meridional effect for detection in monochromatic light was found in the present study as well as in the study by Atchison et al, 25 both using Gaussian windowed gratings.…”

“…In green light, a meridional effect of 0.10 logMAD was found, which is somewhat lower than the values reported in a study by Atchison et al 25 (0.20 logMAD), where the measurements were done with optimal refractive correction in monochromatic light on one subject. In green light, a meridional effect of 0.10 logMAD was found, which is somewhat lower than the values reported in a study by Atchison et al 25 (0.20 logMAD), where the measurements were done with optimal refractive correction in monochromatic light on one subject.…”

“…Sinusoidal gratings are a common stimulus choice for research on peripheral vision, 5,6,18,25,26 suitable for evaluating detection and resolution acuity and contrast sensitivity. Sinusoidal gratings are a common stimulus choice for research on peripheral vision, 5,6,18,25,26 suitable for evaluating detection and resolution acuity and contrast sensitivity.…”

Myopia—Yesterday, Today, and Tomorrow

“…An on-axis correction degraded peripheral grating acuity and contrast thresholds compared with what was obtained while wearing an optimal peripheral refractive correction. 34 Peripheral visual performance could be restored with custom design spectacles in this study, at least across the horizontal meridian. Overnight orthokeratology and bifocal soft contact lenses are the two main modes of altering peripheral defocus; spectacle designs have had only moderate success.…”

Peripheral aberrations in adult hyperopes, emmetropes and myopes

“…Hyperopia is associated with amblyopia, 11 strabismus, 12 reduction in reading efficiency and poor school performance, 13 decreased visual acuity 14 and bilateral visual impairment. 15 However, research on the relationship between peripheral aberrations and central refractive error has concentrated on myopes and emmetropes 2,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] with little attention given to hyperopic eyes, especially for the higher order aberrations. The low prevalence of hyperopia in adults, 33,34 and the difficulty in measuring its magnitude accurately in young subjects 35 are probable reasons for this.…”