Myopes experience greater contrast adaptation during reading

McGonigle, Colm; Linde, Ian van der; Pardhan, Shahina; Engel, Stephen A.; Mallen, Edward A. H.; Allen, Peter M.

doi:10.1016/j.visres.2016.01.001

Cited by 3 publications

(1 citation statement)

References 62 publications

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“…Der Zusammenhang zwischen Aberrationen höherer Ordnung und Kontrastsensitivität ist jedoch komplex [69], insbesondere scheint die Kontrastschwelle der peripheren Netzhaut bei Myopie empfindlicher von der Aufmerksamkeit der Betroffenen abzuhängen [73]. Nach Fokussierung auf die Nähe und Lesen entsprechender Optotypen zeigen myope Menschen eine Zunahme der Kontrastadaptation [95]. Bereits in früher Jugend ist die Lebensqualität aber geringfügig gegenüber Emmetropen vermindert [130].…”

Section: Behinderung Und Folgenunclassified

Sekundärerkrankungen bei hoher Myopie

2016

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Section: Behinderung Und Folgenunclassified

Sekundärerkrankungen bei hoher Myopie

2016

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IMI Accommodation and Binocular Vision in Myopia Development and Progression

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Radhakrishnan

Cruickshank

et al. 2021

Invest. Ophthalmol. Vis. Sci.

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The role of accommodation in myopia development and progression has been debated for decades. More recently, the understanding of the mechanisms involved in accommodation and the consequent alterations in ocular parameters has expanded. This International Myopia Institute white paper reviews the variations in ocular parameters that occur with accommodation and the mechanisms involved in accommodation and myopia development and progression. Convergence is synergistically linked with accommodation and the impact of this on myopia has also been critiqued. Specific topics reviewed included accommodation and myopia, role of spatial frequency, and contrast of the task of objects in the near environment, color cues to accommodation, lag of accommodation, accommodative-convergence ratio, and near phoria status. Aspects of retinal blur from the lag of accommodation, the impact of spatial frequency at near and a short working distance may all be implicated in myopia development and progression. The response of the ciliary body and its links with changes in the choroid remain to be explored. Further research is critical to understanding the factors underlying accommodative and binocular mechanisms for myopia development and its progression and to guide recommendations for targeted interventions to slow myopia progression.

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Short-Term Peripheral Contrast Reduction Affects Central Chromatic and Achromatic Contrast Sensitivity

et al. 2022

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Peripheral retinal contrast reduction is suggested as a potential myopia control strategy. However, the underlying mechanism is yet unknown. Therefore, this study investigated the influence of peripheral contrast reduction on central chromatic and achromatic contrast sensitivity (CS). A total of 19 participants were included. Peripheral contrast reduction was induced via Bangerter foils of 0.4 and 0.8 density, each with a clear central zone of 8.0 mm diameter. Central achromatic and chromatic (for S-, M-, and L-cone types) CS was measured at 3 and 12 cpd in a 2-IFC psychophysical procedure. CS was tested monocularly at 0, 30, and 90 min of adaptation time, while the fellow eye was covered by an infrared filter. With the filter in place, pupil size was controlled to be smaller than the clear central aperture. Data were analyzed using linear mixed models. Cone-type CS showed significant differences among each other (all p < 0.05), except for the achromatic and L-cone type (p = 0.87). The minimum sensitivity was found with the S-cone type and the maximum with the M-cone type. Central achromatic and chromatic CS were equally affected by diffusion. The level of peripheral diffusion also influenced CS, while the 0.8 Bangerter foil led to a higher reduction in CS compared to the 0.4 Bangerter foil (p = 0.0008) and the control condition (p = 0.05). A significant reduction in CS occurred between 30 and 90 min of adaptation time (p < 0.0001). The current study found that peripheral contrast reduction impacted central achromatic and chromatic CS equally. It further showed that the amplitude of reduction was influenced by the level of diffusion, with the reduction becoming more pronounced over time.

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Myopes experience greater contrast adaptation during reading

Cited by 3 publications

References 62 publications

Sekundärerkrankungen bei hoher Myopie

Sekundärerkrankungen bei hoher Myopie

IMI Accommodation and Binocular Vision in Myopia Development and Progression

Short-Term Peripheral Contrast Reduction Affects Central Chromatic and Achromatic Contrast Sensitivity

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