Sensory Eye Dominance in Treated Anisometropic Amblyopia

Chen, Yao; Wang, Jiafeng; Shi, Hongmei; Wang, Xiaoxiao; Feng, Lei

doi:10.1155/2017/9438072

Cited by 5 publications

(5 citation statements)

References 22 publications

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“…(2017; see the baseline condition in their Figure 5) for their eight observers was indicative of RE dominance, and most observers would surely be classified as such given the small SD. Also, Y. Chen, Wang, Shi, Wang, and Feng (2017; see their Figure 2) reported that ϕ ≈ 0 for most of their 15 normal observers, indicating nondominance; whether the remaining observers had LE or RE dominance is undecipherable. The same holds for the 40 observers in the normal control group of Kwon et al.…”

Section: Resultsmentioning

confidence: 97%

Psychophysical Tests Do Not Identify Ocular Dominance Consistently

García‐Pérez

Peli

2019

i-Perception

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Classical sighting or sensory tests are used in clinical practice to identify the dominant eye. Several psychophysical tests were recently proposed to quantify the magnitude of dominance but whether their results agree was never investigated. We addressed this question for the two most common psychophysical tests: The perceived-phase test , which measures the cyclopean appearance of dichoptically presented sinusoids of different phase, and the coherence-threshold test , which measures interocular differences in motion perception when signal and noise stimuli are presented dichoptically. We also checked for agreement with three classical tests (Worth 4-dot, Randot suppression, and Bagolini lenses). Psychophysical tests were administered in their conventional form and also using more dependable psychophysical methods. The results showed weak correlations between psychophysical measures of strength of dominance with inconsistent identification of the dominant eye across tests: Agreement on left-eye dominance, right-eye dominance, or nondominance by both tests occurred only for 11 of 40 observers (27.5%); the remaining 29 observers were classified differently by each test, including 14 cases (35%) of opposite classification (left-eye dominance by one test and right-eye dominance by the other). Classical tests also yielded conflicting results that did not agree well with classification based on psychophysical tests. The results are discussed in the context of determination of ocular dominance for clinical decisions.

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Section: Resultsmentioning

confidence: 97%

Psychophysical Tests Do Not Identify Ocular Dominance Consistently

García‐Pérez

Peli

2019

i-Perception

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“…Indeed, we reported a mean (pretraining) perceived phase of just 2.5 degrees, in line with small deviations reported in previous studies testing normal observers. [43][44][45] Therefore, changes in sensory eye dominance may not be easily detected by this task due to the relatively balanced baseline performance. Unfortunately, previous studies that treated amblyopes with dichoptic training paradigms did not employ the binocular phase combination task to quantify changes in sensory eye dominance.…”

Section: Learning-driven Changes In Sensory Eye Dominancementioning

confidence: 99%

Dichoptic Perceptual Training and Sensory Eye Dominance Plasticity in Normal Vision

Kam

Chang

2021

Invest. Ophthalmol. Vis. Sci.

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Purpose We introduce a set of dichoptic training tasks that differ in terms of (1) the presence of external noise and (2) the visual feature implicated (motion, orientation), examining the generality of training effects between the different training and test cues and their capacity for driving changes in sensory eye dominance and stereoscopic depth perception. Methods We randomly assigned 116 normal-sighted observers to five groups (four training groups and one no training group). All groups completed both pre- and posttests, during which they were tested on dichoptic motion and orientation tasks under noisy and noise-free conditions, as well as a binocular phase combination task and two depth tasks to index sensory eye dominance and binocular function. Training groups received visual training on one of the four dichoptic tasks over 3 consecutive days. Results Training under noise-free conditions supported generalization of learning to noise-free tasks involving an untrained feature. By contrast, there was a symmetric learning transfer between the signal-noise and no-noise tasks within the same visual feature. Further, training on all tasks reduced sensory eye dominance but did not improve depth perception. Conclusions Training-driven changes in sensory eye balance do not depend on the stimulus feature or whether the training entails the presence of external noise. We conjecture that dichoptic visual training acts to balance interocular suppression before or at the site of binocular combination.

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“…Recovery of amblyopia is often determined by tracking the difference in visual acuity between the eyes after a period of monocular treatment. However, studies show that individuals who have been supposedly treated with amblyopia as measured with their improved visual acuity of the amblyopic eye still exhibit binocular imbalance as a function of spatial frequency (Chen et al, 2017(Chen et al, , 2021Zhao et al, 2017). This finding indicates that the binocular imbalance, which could be due to imbalanced suppression, in amblyopia still remains even if visual acuity gets improved throughout standard treatment such as monocular occlusion of the fellow eye (Kehrein et al, 2016;Jia et al, 2018;Chen et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Measuring the impact of suppression on visual acuity in children with amblyopia using a dichoptic visual acuity chart

Zhu

Liu

2022

Front. Neurosci.

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PurposeTo develop a novel dichoptic visual acuity chart that measures the impact of interocular suppression on the visual acuity of each eye when two eyes are open.MethodsFifty-four subjects (19 anisometropic amblyopia, 20 treated amblyopia, and 15 normal children) participated in this study. The visual acuity that was tested under dichoptic-optotypes condition (i.e., presented optotypes to the untested eye) was compared with that under monocular condition (i.e., cover the untested eye with opaque patch). Visual acuity differences between these two conditions were compared among the three groups. The correlations between visual acuity differences and the depth of interocular suppression were then computed. Some participants performed the visual acuity test under dichoptic-luminance condition (i.e., presented mean luminance to the untested eye), and the test-retest reliability was established.ResultsA reduced visual acuity of the non-dominant eye was found in the dichoptic-optotypes condition for the amblyopia group (P < 0.001) and the treated group (P = 0.001); the difference in the treated group was less than that in the amblyopia group (P < 0.001) but more than that in the normal group (P = 0.026). A significant correlation was found between the visual acuity differences and the depth of suppression, which was tested with a binocular phase combination task (P = 0.005). No change was found in the dichoptic-luminance condition.ConclusionThe amblyopic eye and the previous amblyopic eye seem to suffer from a reduced visual acuity when two eyes are open due to suppression. This was successfully captured by our novel and reliable dichoptic-optotypes visual acuity chart.

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Sensory Eye Dominance in Treated Anisometropic Amblyopia

Cited by 5 publications

References 22 publications

Psychophysical Tests Do Not Identify Ocular Dominance Consistently

Psychophysical Tests Do Not Identify Ocular Dominance Consistently

Dichoptic Perceptual Training and Sensory Eye Dominance Plasticity in Normal Vision

Measuring the impact of suppression on visual acuity in children with amblyopia using a dichoptic visual acuity chart

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