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Wang J, He X, Bao M. Attention enhances short-term monocular deprivation effect. Psych J 2025; 14:84-93. [PMID: 39396922 PMCID: PMC11787881 DOI: 10.1002/pchj.806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 09/14/2024] [Indexed: 10/15/2024]
Abstract
Patching one eye of an adult human for a few hours has been found to promote the dominance of the patched eye, which is called short-term monocular deprivation effect. Interestingly, recent work has reported that prolonged eye-specific attention can also cause a shift of ocular dominance toward the unattended eye though visual inputs during adaptation are balanced across the eyes. Considering that patching blocks all input information from one eye, attention is presumably deployed to the opposite eye. Therefore, the short-term monocular deprivation effect might be, in part, mediated by eye-specific attentional modulation. Yet this question remains largely unanswered. To address this issue, here we asked participants to perform an attentive tracking task with one eye patched. During the tracking, participants were presented with both target gratings (attended stimuli) and distractor gratings (unattended stimuli) that were distinct from each other in fundamental visual features. Before and after one hour of tracking, they completed a binocular rivalry task to measure perceptual ocular dominance. A larger shift of ocular dominance toward the deprived eye was observed when the binocular rivalry testing gratings shared features with the target gratings during the tracking compared to when they shared features with the distractor gratings. This result, for the first time, suggests that attention can boost the strength of the short-term monocular deprivation effect. Therefore, the present study sheds new light on the role of attention in ocular dominance plasticity.
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Affiliation(s)
- Jue Wang
- CAS Key Laboratory of Behavioral Science, Institute of PsychologyChinese Academy of SciencesBeijingChina
- Department of PsychologyUniversity of Chinese Academy of SciencesBeijingChina
| | - Xin He
- CAS Key Laboratory of Behavioral Science, Institute of PsychologyChinese Academy of SciencesBeijingChina
- Department of PsychologyUniversity of Chinese Academy of SciencesBeijingChina
| | - Min Bao
- CAS Key Laboratory of Behavioral Science, Institute of PsychologyChinese Academy of SciencesBeijingChina
- Department of PsychologyUniversity of Chinese Academy of SciencesBeijingChina
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Zou L, Zhou C, Hess RF, Zhou J, Min SH. Daily dose-response from short-term monocular deprivation in adult humans. Ophthalmic Physiol Opt 2024; 44:564-575. [PMID: 38317572 DOI: 10.1111/opo.13282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 01/14/2024] [Accepted: 01/21/2024] [Indexed: 02/07/2024]
Abstract
Short-term monocular deprivation (MD) shifts sensory eye balance in favour of the previously deprived eye. The effect of MD on eye balance is significant but brief in adult humans. Recently, researchers and clinicians have attempted to implement MD in clinical settings for adults with impaired binocular vision. Although the effect of MD has been studied in detail in single-session protocols, what is not known is whether the effect of MD on eye balance deteriorates after repeated periods of MD (termed 'perceptual deterioration'). An answer to this question is relevant for two reasons. Firstly, the effect of MD (i.e., dose-response) should not decrease with repeated use if MD is to be used therapeutically (e.g., daily for weeks). Second, it bears upon the question of whether the neural basis of the effects of MD and contrast adaptation, a closely related phenomenon, is the same. The sensory change from contrast adaptation depends on recent experience. If the observer has recently experienced the same adaptation multiple times for consecutive days, then the adaptation effect will be smaller because contrast adaptation exhibits perceptual deterioration, so it is of interest to know if the effects of MD follow suit. This study measured the effect of 2-h MD for seven consecutive days on binocular balance of 15 normally sighted adults. We found that the shift in eye balance from MD stayed consistent, showing no signs of deterioration after subjects experienced multiple periods of MD. This finding shows no loss of effectiveness of repeated daily doses of MD if used therapeutically to rebalance binocular vision in otherwise normal individuals. Furthermore, ocular dominance plasticity, which is the basis of the effects of short-term MD, does not seem to share the property of 'perceptual deterioration' with contrast adaptation, suggesting different neural bases for these two related phenomena.
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Affiliation(s)
- Liying Zou
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Affiliated Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Chenyan Zhou
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Affiliated Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Robert F Hess
- McGill Vision Research, Department of Ophthalmology and Visual Sciences, McGill University, Montreal, Quebec, Canada
| | - Jiawei Zhou
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Affiliated Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Seung Hyun Min
- State Key Laboratory of Ophthalmology, Optometry and Visual Science, Affiliated Eye Hospital, Wenzhou Medical University, Wenzhou, China
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Li J, Cheng Z, Li J, Li L, Chen L, Tao J, Wang Z, Wu D, Zhang P. Short-term monocular pattern deprivation reduces the internal additive noise of the visual system. Front Neurosci 2023; 17:1155034. [PMID: 37588514 PMCID: PMC10426733 DOI: 10.3389/fnins.2023.1155034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 07/13/2023] [Indexed: 08/18/2023] Open
Abstract
Previous studies have shown that short-term monocular pattern deprivation can shift perceptual dominance in favor of the deprived eye. However, little is known about the effect of monocular pattern deprivation on contrast sensitivity (CS) and its corresponding mechanisms. Here, contrast sensitivity function (CSF) in the nondominant eye of normal subjects was evaluated before and after 150 min of monocular pattern deprivation. To obtain a CSF with high precision and efficiency before deprivation effect washout, a quick CSF (qCSF) method was used to assess CS over a wide range of spatial frequencies and at two external noise levels. We found that (1) monocular pattern deprivation effectively improved the CS of the deprived eye with larger effect on high spatial frequencies, (2) CS improvement only occurred when external noise was absent and its amount was spatial frequency dependent, and (3) a perceptual template model (PTM) revealed that decreased internal additive noise accounted for the mechanism of the monocular pattern derivation effect. These findings help us better understand the features of short-term monocular pattern deprivation and shed light on the treatment of amblyopia.
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Affiliation(s)
- Jinwei Li
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
| | - Zhenhui Cheng
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
| | - Jing Li
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
| | - Linghe Li
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
| | - Lijun Chen
- Department of Psychology, Shandong Normal University, Jinan, China
| | - Jiayu Tao
- Department of Psychology, Chengde Medical University, Chengde, China
| | - Zeng Wang
- Department of Psychology, Hebei Medical University, Shijiazhuang, China
| | - Di Wu
- Military Medical Psychology School, Air Force Medical University, Xi’an, China
| | - Pan Zhang
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
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Hess RF, Hyun Min S. Is ocular dominance plasticity a special case of contrast adaptation? Vision Res 2023; 207:108212. [PMID: 36963276 DOI: 10.1016/j.visres.2023.108212] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/15/2022] [Accepted: 12/15/2022] [Indexed: 03/26/2023]
Abstract
The visual system can regulate its sensitivity depending on the prevailing contrast conditions. This is known as contrast adaptation and reflects contrast gain changes at different stages along the visual pathway. Recently, it has been shown that depriving an eye of visual stimulation for a short period of time can lead to neuroplastic changes in ocular dominance as the result of homeostatic changes in contrast gain. Here we examine, on the basis of previously published results, whether the neuroplastic ocular dominance changes are just manifestation of the mechanism responsible for contrast adaptation. The evidence suggests that these two visual processes are separate and do not have a common neural substrate.
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Affiliation(s)
- Robert F Hess
- McGill Vision Research, Department of Vision Sciences and Ophthalmology, McGill University, Montreal, Quebec, Canada.
| | - Seung Hyun Min
- McGill Vision Research, Department of Vision Sciences and Ophthalmology, McGill University, Montreal, Quebec, Canada.
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Chen Y, Mao Y, Zhou J, He Z, Hess RF. The shift in sensory eye dominance from short-term monocular deprivation exhibits no dependence on test spatial frequency. EYE AND VISION 2022; 9:32. [PMID: 36045414 PMCID: PMC9434876 DOI: 10.1186/s40662-022-00303-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 08/08/2022] [Indexed: 12/02/2022]
Abstract
Background Studies have shown that short-term monocular deprivation induces a shift in sensory eye dominance in favor of the deprived eye. Yet, how short-term monocular deprivation modulates sensory eye dominance across spatial frequency is not clear. To address this issue, we conducted a study to investigate the dependence of short-term monocular deprivation effect on test spatial frequency. Methods Ten healthy young adults (age: 24.7 ± 1.7 years, four males) with normal vision participated. We deprived their dominant eye with a translucent patch for 2.5 h. The interocular contrast ratio (dominant eye/non-dominant eye, i.e., the balance point [BP]), which indicates the contribution that the two eyes make to binocular combination, was measured using a binocular orientation combination task. We assessed if BPs at 0.5, 4 or 6 cycles/degree (c/d) change as a result of monocular deprivation. Different test spatial frequency conditions were conducted on three separate days in a random fashion. Results We compared the BPs at 0.5, 4 and 6 c/d before and after monocular deprivation. The BPs were found to be significantly affected by deprivation, where sensory eye dominance shift to the deprived eye (F1.86, 16.76 = 33.09, P < 0.001). The changes of BP were consistent at 0.5, 4, and 6 c/d spatial frequencies (F2,18 = 0.15, P = 0.57). Conclusion The sensory eye dominance plasticity induced by short-term deprivation is not dependent on test spatial frequency, suggesting it could provide a practical solution for amblyopic therapy that was concerned with the binocular outcome. Supplementary Information The online version contains supplementary material available at 10.1186/s40662-022-00303-4.
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Tao J, Yang Z, Li J, Cheng Z, Li J, Huang J, Wu D, Zhang P. The Mechanism of Short-Term Monocular Pattern Deprivation-Induced Perceptual Eye Dominance Plasticity. Front Hum Neurosci 2022; 16:854003. [PMID: 35712531 PMCID: PMC9192955 DOI: 10.3389/fnhum.2022.854003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 05/11/2022] [Indexed: 11/13/2022] Open
Abstract
Previously published studies have reported that 150 min of short-term monocular deprivation temporarily changes perceptual eye dominance. However, the possible mechanisms underlying monocular deprivation-induced perceptual eye dominance plasticity remain unclear. Using a binocular phase and contrast co-measurement task and a multi-pathway contrast-gain control model (MCM), we studied the effect of 150 min of monocular pattern deprivation (MPD) in normal adult subjects. The perceived phase and contrast varied significantly with the interocular contrast ratio, and after MPD, the patched eye (PE) became dominant. Most importantly, we focused on the potential mechanisms of the deprivation effect. The data of an averaged subject was best fitted by a model, which assumed a monocular signal enhancement of the PE after the MPD. The present findings might have important implications for investigations of binocular vision in both normal and amblyopic populations.
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Affiliation(s)
- Jiayu Tao
- Department of Psychology, Chengde Medical University, Chengde, China
| | - Zhijie Yang
- Department of Psychology, Chengde Medical University, Chengde, China
- *Correspondence: Zhijie Yang
| | - Jinwei Li
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
| | - Zhenhui Cheng
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
| | - Jing Li
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
| | - Jinfeng Huang
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
| | - Di Wu
- Department of Medical Psychology, Air Force Medical University, Xi'an, China
| | - Pan Zhang
- Department of Psychology, Hebei Normal University, Shijiazhuang, China
- Pan Zhang
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Lin 林温曼 W, Wei 魏君涵 J, Wang 王文静 W, Zou 邹李颖 L, Zhou 周诗旗 S, Jiang 江楠 N, Reynaud A, Zhou 周佳玮 J, Yu 于旭东 X, Hess RF. Rapid alternate monocular deprivation does not affect binocular balance and correlation in human adults. eNeuro 2022; 9:ENEURO.0509-21.2022. [PMID: 35523581 PMCID: PMC9131719 DOI: 10.1523/eneuro.0509-21.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 04/08/2022] [Accepted: 04/28/2022] [Indexed: 11/21/2022] Open
Abstract
Recent studies show that the human adult visual system exhibits neural plasticity. For instance, short-term monocular deprivation shifts the eye dominance in favor of the deprived eye. This phenomenon is believed to occur in the primary visual cortex by reinstating neural plasticity. However, it is unknown whether the changes in eye dominance after monocularly depriving the visual input can also be induced by alternately depriving both eyes. In this study, we found no changes in binocular balance and interocular correlation sensitivity after a rapid (7 Hz), alternate and monocular deprivation for one hour in adults. Therefore, the effect of short-term monocular deprivation cannot seem to be emulated by alternately and rapidly depriving both eyes.Significance statementPrevious work has shown that short-term binocular function disruption, which its most extreme form is monocular deprivation, could induce neural plasticity in adult visual system. In this study, we found a balanced deprivation of binocular function could not induce a neuroplastic change in human adults. It appears that ocular dominance plasticity in human adults is unique in so far as it is only driven by an input imbalance not balanced deprivation of binocular function.
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Affiliation(s)
- Wenman Lin 林温曼
- School of Ophthalmology and Optometry and Eye hospital, and State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, Zhejiang, China, 325000
| | - Junhan Wei 魏君涵
- Xi'an People's Hospital (Xi'an Fourth Hospital), Shaanxi Eye Hospital, Affiliated Guangren Hospital School of Medicine, Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Wenjing Wang 王文静
- School of Ophthalmology and Optometry and Eye hospital, and State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, Zhejiang, China, 325000
| | - Liying Zou 邹李颖
- School of Ophthalmology and Optometry and Eye hospital, and State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, Zhejiang, China, 325000
| | - Shiqi Zhou 周诗旗
- School of Ophthalmology and Optometry and Eye hospital, and State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, Zhejiang, China, 325000
| | - Nan Jiang 江楠
- School of Ophthalmology and Optometry and Eye hospital, and State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, Zhejiang, China, 325000
| | - Alexandre Reynaud
- McGill Vision Research, Department of Ophthalmology and Visual Sciences, McGill University, Montreal, QC, Canada
| | - Jiawei Zhou 周佳玮
- School of Ophthalmology and Optometry and Eye hospital, and State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, Zhejiang, China, 325000
| | - Xudong Yu 于旭东
- School of Ophthalmology and Optometry and Eye hospital, and State Key Laboratory of Ophthalmology, Optometry and Vision Science, Wenzhou Medical University, Wenzhou, Zhejiang, China, 325000
| | - Robert F Hess
- McGill Vision Research, Department of Ophthalmology and Visual Sciences, McGill University, Montreal, QC, Canada
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Nguyen BN, Malavita M, Carter OL, McKendrick AM. Neuroplasticity in older adults revealed by temporary occlusion of one eye. Cortex 2021; 143:1-11. [PMID: 34365199 DOI: 10.1016/j.cortex.2021.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 06/23/2021] [Accepted: 07/01/2021] [Indexed: 12/01/2022]
Abstract
Occluding one eye for several hours alters visual experience. Specifically, occluding one eye shifts the balance of ocular dominance to favour the recently deprived eye, which can be measured using binocular rivalry. This ocular dominance shift demonstrates homeostatic neuroplasticity within the visual system and has been explored in detail in younger adults. Here we measure whether the strength and general features of neuroplasticity revealed by monocular patching are maintained in older adults. Thirty younger (18-35 years) and 30 older adults (60-81 years) participated. Binocular rivalry features were measured before and after 2 h of occlusion. Post-patching, perceptual dominance of the non-patched eye decreased (p < .001) in both age groups. The effect of occlusion on all features of binocular rivalry did not significantly differ between groups. The older visual system maintains the ability to rapidly adjust to changes in perceptual experience induced by eye occlusion. This preservation of neuroplasticity suggests that visual training methods designed to improve visual performance based on eye occlusion should maintain effectiveness into older age.
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Affiliation(s)
- Bao N Nguyen
- C/O Department of Optometry and Vision Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Menaka Malavita
- C/O Department of Optometry and Vision Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Olivia L Carter
- C/O School of Psychological Sciences, The University of Melbourne, Parkville, Victoria, Australia
| | - Allison M McKendrick
- C/O Department of Optometry and Vision Sciences, The University of Melbourne, Parkville, Victoria, Australia.
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Barboni MTS, Maneschg OA, Németh J, Nagy ZZ, Vidnyánszky Z, Bankó ÉM. Dichoptic Spatial Contrast Sensitivity Reflects Binocular Balance in Normal and Stereoanomalous Subjects. Invest Ophthalmol Vis Sci 2020; 61:23. [PMID: 32931571 PMCID: PMC7500129 DOI: 10.1167/iovs.61.11.23] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 08/17/2020] [Indexed: 01/27/2023] Open
Abstract
Purpose To study binocular balance by comparing dichoptic and standard monocular contrast sensitivity function (CSF) in stereonormal and stereoanomalous/stereoblind amblyopic subjects. Methods Sixteen amblyopes and 17 controls participated. Using the capability of the passive three-dimensional display, we measured their CSF both monocularly and dichoptically at spatial frequencies 0.5, 1, 2, 4, and 8 cpds using achromatic Gabor patches on a luminance noise background. During monocular stimulation, the untested eye was covered, while for the dichoptic stimulation the untested eye viewed background noise. Dichoptic CSF of both eyes was acquired within one block. Results In patients with central fixation, dichoptic viewing had a large negative impact on the CSF of the amblyopic eye, although it hardly affected that of the dominant eye. In contrast, dichoptic viewing had a small but significant effect on both eyes for controls. In addition, all participants lay along a continuum in terms of how much their two eyes were affected by dichoptic stimulation: by using two predefined contrast sensitivity ratios, namely, amblyopic sensitivity decrement and dichoptic sensitivity decrement, not only did we find a significant correlation between these variables among all participants, but also the two groups were identified with minimum error using a cluster analysis. Conclusions Dichoptic CSF may be considered to measure visual performance in patients with altered binocular vision, because it better reflects the visual capacity of the amblyopic eye than the standard monocular examinations. It may also be a more reliable parameter to assess the efficacy of modern approaches to treat amblyopia.
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Affiliation(s)
| | - Otto Alexander Maneschg
- Department of Ophthalmology, Semmelweis University, Budapest, Hungary
- Bionic Innovation Center, Budapest, Hungary
| | - János Németh
- Department of Ophthalmology, Semmelweis University, Budapest, Hungary
- Bionic Innovation Center, Budapest, Hungary
| | - Zoltán Zsolt Nagy
- Department of Ophthalmology, Semmelweis University, Budapest, Hungary
| | - Zoltán Vidnyánszky
- Brain Imaging Centre, Research Centre for Natural Sciences, Budapest, Hungary
| | - Éva M. Bankó
- Brain Imaging Centre, Research Centre for Natural Sciences, Budapest, Hungary
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Tao C, He Z, Chen Y, Zhou J, Hess RF. Can Short-Term Ocular Dominance Plasticity Provide a General Index to Visual Plasticity to Personalize Treatment in Amblyopia? Front Neurosci 2020; 14:625. [PMID: 32714129 PMCID: PMC7344240 DOI: 10.3389/fnins.2020.00625] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 05/19/2020] [Indexed: 11/13/2022] Open
Abstract
Purpose Recently, Lunghi et al. (2016) showed that amblyopic eye’s visual acuity per se after 2 months of occlusion therapy could be predicted by a homeostatic plasticity, that is, the temporary shift of perceptual eye dominance observed after a 2-h monocular deprivation, in children with anisometropic amblyopia. In this study, we assess whether the visual acuity improvement of the amblyopic eye measured after 2 months of occlusion therapy could be predicted by this plasticity. Methods Seven children (6.86 ± 1.46 years old; SD) with anisometropic amblyopia participated in this study. All patients were newly diagnosed and had no treatment history before participating in our study. They finished 2 months of refractive adaptation and then received a 4-h daily fellow eye patching therapy with an opaque patch for a 2-month period. Best-corrected visual acuity of the amblyopic eye was measured before and after the patching therapy. The homeostatic plasticity was assessed by measuring the temporary shift of perceptual eye dominance from 2-h occlusion of the amblyopic eye before treatment. A binocular phase combination paradigm was used for this study. Results We found that there was no significant correlation between the temporary shift of perceptual eye dominance observed after 2-h occlusion of the amblyopic eye and the improvement in visual acuity in the amblyopic eye from 2 months of classical patching therapy. This result, although in disagreements with the conclusions of Lunghi et al. involving the short-term patching of the amblyopic eye, is in fact consistent with a reanalysis of Lunghi and colleagues’ data. Conclusion The short-term changes in perceptual eye dominance as a result of short-term monocular deprivation do not provide an index of cortical plasticity in the general sense such that they are able to predict acuity outcomes from longer-term classical patching.
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Affiliation(s)
- Chunwen Tao
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Zhifen He
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Yiya Chen
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Jiawei Zhou
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Robert F Hess
- Department of Ophthalmology and Visual Sciences, McGill Vision Research, McGill University, Montreal, QC, Canada
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11
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Wang M, McGraw P, Ledgeway T. Short-term monocular deprivation reduces inter-ocular suppression of the deprived eye. Vision Res 2020; 173:29-40. [PMID: 32460171 DOI: 10.1016/j.visres.2020.05.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 05/07/2020] [Accepted: 05/10/2020] [Indexed: 10/24/2022]
Abstract
The adult visual system was traditionally thought to be relatively hard-wired, but recent studies have challenged this view by demonstrating plasticity following short-term monocular deprivation. Depriving one eye of spatial information for 2-3 h increased subsequent sensory dominance of that eye. However, the mechanism underlying this phenomenon is unclear. The present study sought to address this issue and determine the consequences of short-term monocular deprivation on inter-ocular suppression of each eye. Sensory eye dominance was examined before and after depriving an eye of all input using an opaque patch for 2.5 h, in six adult participants with normal binocular vision. We used a percept tracking task during binocular rivalry (BR) to assess the relative eye dominance, and an objective probe detection task under continuous flash suppression (CFS) to quantify each eye's susceptibility to inter-ocular suppression. The monocular contrast increment threshold of each eye was also measured using the probe task to ascertain if the altered eye dominance is accompanied by changes in monocular perception. Our BR results replicated previous findings of a shift of relative dominance towards the eye that has been deprived of form information. More crucially, using CFS we demonstrated reduced inter-ocular suppression of the deprived eye with no complementary changes in the other eye, and no monocular changes in increment threshold. These findings imply that short-term monocular deprivation alters binocular interactions. The differential effect on inter-ocular suppression between eyes may have important implications for the use of patching as a therapy to recover visual function in amblyopia.
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Affiliation(s)
- Mengxin Wang
- School of Psychology, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
| | - Paul McGraw
- School of Psychology, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Timothy Ledgeway
- School of Psychology, University of Nottingham, Nottingham NG7 2RD, United Kingdom
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12
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Lyu L, He S, Jiang Y, Engel SA, Bao M. Natural-scene-based Steady-state Visual Evoked Potentials Reveal Effects of Short-term Monocular Deprivation. Neuroscience 2020; 435:10-21. [PMID: 32229234 DOI: 10.1016/j.neuroscience.2020.03.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 03/20/2020] [Accepted: 03/23/2020] [Indexed: 01/23/2023]
Abstract
Ocular dominance plasticity beyond the critical period has been demonstrated in adult humans in recent investigations of short-term monocular deprivation (MD). To our knowledge, all previous research adopted non-natural synthetic stimuli in testing perceptual ocular dominance before and after the MD. However, it is recognized that complex natural stimuli may engage cortical mechanisms substantially different from simple synthetic stimuli. Therefore, it remains largely unknown whether reshaping of ocular dominance following MD could be observed during perception of natural scene stimuli without conspicuous interocular competition. Here we used the steady-state visual evoked potential (SSVEP) technique to measure the ocular-specific neural effects of MD with natural scene stimuli where the two eyes' images were tagged with different frequencies. Two hours of MD boosted the neural gain for the deprived eye. During the course of MD, the SSVEP amplitude ratio for the deprived eye compared to the non-deprived eye increased significantly over time, indicating a progressive increase of neural gain for the deprived eye. These findings demonstrate that the effects of short-term MD can manifest when viewing natural scenes, providing a natural case in support of the homeostatic compensation theory of MD. Our work also indicates that the technique of natural-scene-based SSVEP could be particularly useful for future work exploring the neural dynamics during adaptation to natural stimuli.
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Affiliation(s)
- Lili Lyu
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sheng He
- Department of Psychology, University of Minnesota, Minneapolis, MN 55455, USA; State Key Laboratory of Brain and Cognitive Science, Beijing 100101, China
| | - Yi Jiang
- Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Brain and Cognitive Science, Beijing 100101, China; CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai, China
| | - Stephen A Engel
- Department of Psychology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Min Bao
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Brain and Cognitive Science, Beijing 100101, China.
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Zhou J, He Z, Wu Y, Chen Y, Chen X, Liang Y, Mao Y, Yao Z, Lu F, Qu J, Hess RF. Inverse Occlusion: A Binocularly Motivated Treatment for Amblyopia. Neural Plast 2019; 2019:5157628. [PMID: 31015829 PMCID: PMC6444262 DOI: 10.1155/2019/5157628] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 11/23/2018] [Accepted: 01/08/2019] [Indexed: 11/18/2022] Open
Abstract
Recent laboratory findings suggest that short-term patching of the amblyopic eye (i.e., inverse occlusion) results in a larger and more sustained improvement in the binocular balance compared with normal controls. In this study, we investigate the cumulative effects of the short-term inverse occlusion in adults and old children with amblyopia. This is a prospective cohort study of 18 amblyopes (10-35 years old; 2 with strabismus) who have been subjected to 2 hours/day of inverse occlusion for 2 months. Patients who required refractive correction or whose refractive correction needed updating were given a 2-month period of refractive adaptation. The primary outcome measure was the binocular balance which was measured using a phase combination task; the secondary outcome measures were the best-corrected visual acuity which was measured with a Tumbling E acuity chart and converted to logMAR units and the stereoacuity which was measured with the Random-dot preschool stereogram test. The average binocular gain was 0.11 in terms of the effective contrast ratio (z = -2.344, p = 0.019, 2-tailed related samples Wilcoxon Signed Rank Test). The average acuity gain was 0.13 logMAR equivalent (t(17) = 4.76, p < 0.001, 2-tailed paired samples t-test). The average stereoacuity gain was 339 arc seconds (z = -2.533, p = 0.011). Based on more recent research concerning adult ocular dominance plasticity, we conclude that inverse occlusion in adults and old children with amblyopia does produce long-term gains to binocular balance and that acuity and stereopsis can improve in some subjects.
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Affiliation(s)
- Jiawei Zhou
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Zhifen He
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Yidong Wu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Yiya Chen
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Xiaoxin Chen
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Yunjie Liang
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Yu Mao
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Zhimo Yao
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Fan Lu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Jia Qu
- School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325003, China
| | - Robert F. Hess
- McGill University, McGill Vision Research, Department of Ophthalmology, Quebec, Montreal, Canada H3G 1A4
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Yao Z, He Z, Wang Y, Lu F, Qu J, Zhou J, Hess RF. Absolute Not Relative Interocular Luminance Modulates Sensory Eye Dominance Plasticity in Adults. Neuroscience 2017; 367:127-133. [DOI: 10.1016/j.neuroscience.2017.10.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 10/06/2017] [Accepted: 10/20/2017] [Indexed: 10/18/2022]
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