Perceptual Learning for Rehabilitation in Traumatic Optic Neuropathy

Vaitheeswaran, Krishna; Kaur, Preetinder; Garg, Shalini

doi:10.3109/01658107.2013.856450

Cited by 3 publications

(5 citation statements)

References 11 publications

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“…Perceptual learning has been shown to enhance visual function in a variety of ocular disorders presenting with optical blur by increasing the e ciency of neural processing [10][11][12]. The present study describes the effect of perceptual learning on the postoperative visual function after cataract surgery with implantation of a mono-focal intraocular lens.…”

Section: Discussionmentioning

confidence: 85%

“…However, being a transient phenomenon, adaptation to blur may not be entirely responsible for the bene cial effect on a long term. The enhancement of neural sensitivity so as to enable image processing at low signalnoise ratios has been proposed and may account for the improvement following perceptual learning [11,12]. Blur detection and discrimination of single blurred edges have been demonstrated to be contrast detection tasks [14] and improvement of contrast detection through perceptual learning may enhance the processing of blurred images.…”

Section: Discussionmentioning

confidence: 99%

“…No alterations in orientation of presentation was used for patients with astigmatism. This technique has been previously described by the authors [12].…”

Section: Methodsmentioning

confidence: 99%

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Effect of Neural Vision therapy on uncorrected pseudophakic visual acuity

Vaitheeswaran,

Kaur,

Nadar

2023

Preprint

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Purpose The present study was conducted to investigate the effect of neural vision therapy using perceptual learning on near and distance visual acuity in pseudophakic patients with mono-focal intraocular lenses. Methods The prospective interventional non-comparative study was conducted on 30 pseudophakic patients who had received mono-focal intraocular lenses and required corrective lenses for optimal visual acuity for distance, near or both. Perceptual learning was performed using Gabor gratings of varying spatial frequency and contrast. The distance and near visual acuity as well as contrast sensitivity was assessed before and after the training. The visual function was monitored for a period of three months after intervention. Results The mean age of patients in the study was 68.6 ± 11.05 years and included 16 women and 14 men. There was a significant improvement in distance (0.15 ± 0.13 to 0.05 ± 0.06) and near visual acuity (0.4 ± 0.09 to 0.09 ± 0.07) as well as contrast sensitivity function after the intervention (1.35 ± 0.24 to1.83 ± 0.13). (P < 0.05). Conclusions Neural vision therapy using perceptual learning, significantly improved distance and near acuity, as well as contrast sensitivity in pseudophakic patients. With no alteration in the refractive status, perceptual training improved visual function by enhancing neural processing at low signal-noise ratios seen in uncorrected pseudophakic eyes. Neural vision therapy may be an alternative for enhancing visual function across a range of distances without the need for corrective lenses.

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Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

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Effect of Neural Vision therapy on uncorrected pseudophakic visual acuity

Vaitheeswaran,

Kaur,

Nadar

2023

Preprint

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“…However, only five participants were included in the study. Concerning optic neuropathy, to the best of our knowledge, one study only, a case report, reported the beneficial effect of visual perceptual learning (Vaitheeswaran et al, 2014). Interestingly, another study reported an improvement in feature search performance after PL in patients with AMD, glaucoma and RP (Liu et al, 2007).…”

Section: Pre-chiasmatic Disorders and Perceptual Learningmentioning

confidence: 85%

Vision recovery with perceptual learning and non-invasive brain stimulation: Experimental set-ups and recent results, a review of the literature

Battaglini

Ponzio

Ghiani

et al. 2022

RNN

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Background: Vision is the sense which we rely on the most to interact with the environment and its integrity is fundamental for the quality of our life. However, around the globe, more than 1 billion people are affected by debilitating vision deficits. Therefore, finding a way to treat (or mitigate) them successfully is necessary. Objective: This narrative review aims to examine options for innovative treatment of visual disorders (retinitis pigmentosa, macular degeneration, optic neuropathy, refractory disorders, hemianopia, amblyopia), especially with Perceptual Learning (PL) and Electrical Stimulation (ES). Methods: ES and PL can enhance visual abilities in clinical populations, inducing plastic changes. We describe the experimental set-up and discuss the results of studies using ES or PL or their combination in order to suggest, based on literature, which treatment is the best option for each clinical condition. Results: Positive results were obtained using ES and PL to enhance visual functions, for example, repetitive transorbital Alternating Current Stimulation (rtACS) appeared as the most effective treatment for pre-chiasmatic disorders such as optic neuropathy. A combination of transcranial Direct Current Stimulation (tDCS) and visual training seems helpful for people with hemianopia, while transcranial Random Noise Stimulation (tRNS) makes visual training more efficient in people with amblyopia and mild myopia. Conclusions: This narrative review highlights the effect of different ES montages and PL in the treatment of visual disorders. Furthermore, new options for treatment are suggested. It is noteworthy to mention that, in some cases, unclear results emerged and others need to be more deeply investigated.

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“…To overcome the issue in adults, neuroplasticity, and perceptual learning has been shown to enhance visual function by increasing the efficiency of neural processing, which has also been studied in a variety of ophthalmic disorders, such as optic neuropathy. [35][36][37] Although amblyopia and glaucoma are not the same disease entity, the fundamental idea behind the concept of those disease entities potentially gives a new aspect in eyes with intereye asymmetric glaucoma. Therefore, further studies evaluating the nonocular site implicated in intereye asymmetry are needed.…”

Section: Discussionmentioning

confidence: 99%

Association of Intereye Visual-Sensitivity Asymmetry With Progression of Primary Open-Angle Glaucoma

Bak

Kim

et al. 2021

Invest. Ophthalmol. Vis. Sci.

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PURPOSE.To investigate the relationship between intereye visual field defect (VFD) asymmetry and subsequent VF progression in primary open-angle glaucoma (POAG). METHODS.Moderate-stage patients with POAG (226 eyes of 113 patients) with a single hemifield defect were followed for 8.7 years. Participants were categorized into three groups by initial VF pattern: (1) unilateral VFD, (2) bilateral VFD within same hemifield (superior-superior, inferior-inferior), (3) bilateral VFD within opposite hemifield (superior-inferior). The mean deviation (MD) difference between the intereye was defined as the intereye MD asymmetry index (iMAI). Intereye visual-sensitivity difference within the same hemifield was calculated as the intereye hemifield visual-sensitivity asymmetry index. Functional progression was detected by Glaucoma Progression Analysis. The overall rate of MD change and the association between new indices were evaluated by linear regression. A Kaplan-Meier survival analysis was performed and the factors associated with glaucoma progression were evaluated by Cox proportional hazard modeling. RESULTS.Unilateral VFD eyes and bilateral VFD eyes within opposite VF hemifield showed significant progression and faster rate of MD change compared with bilateral VFD eyes within same VF hemifield (71.1% vs. 45.9% vs. 21.1% [P = 0.001]; -1.27 dB/y vs. −0.64 dB/y vs. −0.32 dB/y [P = 0.001]). Unilateral VFD eyes showed the fastest time to VF progression compared with other groups (P = 0.002). A faster rate of MD change was associated with greater intereye MD asymmetry index (P = 0.001) and greater intereye hemifield visual-sensitivity asymmetric index (P = 0.031), which were significant risk factors for glaucoma progression (all P < 0.001).CONCLUSIONS. Among POAG eyes with comparable hemifield VFDs, eyes without a corresponding hemifield defect in the fellow eye showed faster rates of progression compared with those with a corresponding hemifield defect.

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Perceptual Learning for Rehabilitation in Traumatic Optic Neuropathy

Cited by 3 publications

References 11 publications

Effect of Neural Vision therapy on uncorrected pseudophakic visual acuity

Effect of Neural Vision therapy on uncorrected pseudophakic visual acuity

Vision recovery with perceptual learning and non-invasive brain stimulation: Experimental set-ups and recent results, a review of the literature

Association of Intereye Visual-Sensitivity Asymmetry With Progression of Primary Open-Angle Glaucoma

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