Ocular aberrations in amblyopic children

Al-Debasi, Hind I; Fawzy, Samah Mahmoud; Alsaleh, Ahmad A.

doi:10.1016/j.sjopt.2013.07.007

Cited by 8 publications

(11 citation statements)

References 26 publications

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“…reported that WTR astigmatism showed a greater reduction in magnitude (emmetropisation) compared to ATR astigmatism. More recent studies investigating total ocular aberrations in children have reported that the magnitude of astigmatism is significantly higher in amblyopes (~1.25 to 2.00 D) compared to non‐amblyopic, emmetropic control groups (~0.25 D). In addition, refractory amblyopes (i.e.…”

Section: Visual and Functional Impact Of Astigmatismmentioning

confidence: 99%

The visual and functional impacts of astigmatism and its clinical management

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Vincent

Collins

2014

Ophthalmic Physiologic Optic

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Purpose: To provide a comprehensive overview of research examining the impact of astigmatism on clinical and functional measures of vision, the short and longer term adaptations to astigmatism that occur in the visual system, and the currently available clinical options for the management of patients with astigmatism. Recent findings: The presence of astigmatism can lead to substantial reductions in visual performance in a variety of clinical vision measures and functional visual tasks. Recent evidence demonstrates that astigmatic blur results in short-term adaptations in the visual system that appear to reduce the perceived impact of astigmatism on vision. In the longer term, uncorrected astigmatism in childhood can also significantly impact on visual development, resulting in amblyopia. Astigmatism is also associated with the development of spherical refractive errors. Although the clinical correction of small magnitudes of astigmatism is relatively straightforward, the precise, reliable correction of astigmatism (particularly high astigmatism) can be challenging. A wide variety of refractive corrections are now available for the patient with astigmatism, including spectacle, contact lens and surgical options. Conclusion: Astigmatism is one of the most common refractive errors managed in clinical ophthalmic practice. The significant visual and functional impacts of astigmatism emphasise the importance of its reliable clinical management. With continued improvements in ocular measurement techniques and developments in a range of different refractive correction technologies, the future promises the potential for more precise and comprehensive correction options for astigmatic patients.

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Section: Visual and Functional Impact Of Astigmatismmentioning

confidence: 99%

The visual and functional impacts of astigmatism and its clinical management

Read

Vincent

Collins

2014

Ophthalmic Physiologic Optic

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“…Therefore, we performed measurements under both conditions for the analysis. We selected a 4-mm area of visual-axis HOA analysis, regardless of cycloplegia, because it played the most important role for image quality [ (1,7,9,10,12,13,(22)(23)(24)(25)].…”

Section: Discussionmentioning

confidence: 99%

“…]. However, most of such studies have used a small sample size and measured the HOA by using machines with older technology, and their results have varied highly [ (1,(7)(8)(9)(10)(11)(12)(13)]. A recent novel study using HOA-correcting, real-time, closed-loop adaptive optics perceptual learning system demonstrated BCVA and contrast sensitivity significantly improved in refractive amblyopic eyes in adolescents (mean age, 16 years) [(14)].…”

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confidence: 99%

“…For instance, Prakash et al indicated the maximum differences of R-squared variability estimation value (stepwise regression analysis model in one Zernike polynomial) in the trefoil, coma, and tetrafoil values between idiopathic amblyopic eye and normal fellow eye [(8)]. However, in some studies, the results have varied, probably because they performed measurements using equipment based on different theories, with lower resolution, or from an older generation [(1,9,10,12,13)]. Nevertheless, the HOA affects the image quality; therefore, the HOA, particularly the tetrafoil value measured using iDesign, may influence the amblyopic eye recovery speed.…”

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confidence: 99%

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Correlation Between Refractive Amblyopic Eye Recovery Speed and High-Order Aberration: A High-Order Aberration Amblyopia Recovery Deviation (HARD) pilot study

Liu

Tseng

Huang

et al. 2018

Preprint

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Background: High-order aberration (HOA) may influence visual quality, therefore, we conduced a study to determine the correlation between best-corrected visual acuity (BCVA) recovery speed and high-order aberration (HOA) parameters measured using a new-generation aberrometer. Methods: This is a prospective case series. Children aged 3–7 years with refractive amblyopic eyes (Snellen equivalent < 0.8) were recruited. All participants were followed for at least 6 months after full correction of the refraction error. By using iDesign, the BCVA and the HOA were measured before cycloplegia and after cycloplegia (baseline) and at 3-month intervals. Next, the correlation between BCVA recovery speed after 6 months and mean HOA parameters was determined. The participants were divided into two groups according to BCVA recovery speed to compare the HOA parameters. Results: We analyzed 24 eyes of 12 children [mean age, 4.46 years (range, 3–6)]. Baseline mean BCVA was logarithm of minimal angle of resolution (logMAR) 0.335 (Snellen equivalent 0.46), which improved to logMAR 0.193 (Snellen equivalent 0.64) after treatment with full-correction spectacles for 6 months. The amblyopic eye recovery speed was significantly correlated with the tetrafoil value before cycloplegia (p = 0.045). The fast recovery group also showed significantly lower tetrafoil values before cycloplegia. Conclusion: Some HOA parameters measured using the new-generation high-order aberrometer could predict the recovery speed of refractive amblyopic eyes. The current study results may aid in designing customizable HOA-corrected contact lens for refractory refractive amblyopic eyes.

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“…Amblyopia, a common ophthalmologic disease with a prevalence of 1.6%-3.6%, is considered to be due to insufficient foveal stimulation during a critical period. It has three main types: refractive, strabismic and deprivation amblyopia [1][2][3][4], of which, refractive amblyopia is the most common [5,6].…”

Section: Introductionmentioning

confidence: 99%

Correlation between higher-order aberrations and visual acuity recovery (CoHORT) after spectacles treatment for pediatric refractive amblyopia: A pilot study using iDesign measurement

Liu¹,

Tseng

Huang

et al. 2020

PLoS ONE

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To determine the correlation between higher-order aberrations (HOAs) and best-corrected visual acuity (BCVA) recovery speed after spectacles treatment using iDesign measurements in refractive amblyopic children. Methods This is a prospective case series. Children aged from 3 to 7 years with refractive amblyopia (Landolt C equivalent < 0.8) were recruited. All participants were followed for at least 6 months after full correction of the refraction error by spectacles. The HOAs were measured using iDesign before and after cycloplegia at first visit and at 3-month intervals. Then correlation between BCVA recovery after treatment for 6 months and HOAs was determined. Results We analyzed 24 eyes of 12 children (mean age, 4.5 years). Baseline mean BCVA was logarithm of minimal angle of resolution (logMAR) 0.335 (Landolt C equivalent 0.46), which improved to logMAR 0.193 (Landolt C equivalent 0.64) after treatment with full-correction spectacles for 6 months. The amblyopic eye BCVA recovery was negatively correlated with tetrafoil with/without cycloplegia (P = 0.006 and 0.022, respectively) and trefoil with cycloplegia (P = 0.049). Conclusions trefoil and tetrafoil measured with iDesign negatively correlates with the BCVA recovery speed of refractive amblyopic eyes after spectacles treatment in this pilot study.

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Ocular aberrations in amblyopic children

Cited by 8 publications

References 26 publications

The visual and functional impacts of astigmatism and its clinical management

The visual and functional impacts of astigmatism and its clinical management

Correlation Between Refractive Amblyopic Eye Recovery Speed and High-Order Aberration: A High-Order Aberration Amblyopia Recovery Deviation (HARD) pilot study

Correlation between higher-order aberrations and visual acuity recovery (CoHORT) after spectacles treatment for pediatric refractive amblyopia: A pilot study using iDesign measurement

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