ArticleVision research2018
Comparison of symmetrical prism adaptation to asymmetrical prism adaptation in those with normal binocular vision.
Article in Vision research, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
11 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.
- Interventions for convergence insufficiency: a network meta-analysis.The Cochrane database of systematic reviews · 2020Pooled it
- Objective evaluation of fusional vergence after a vision therapy protocol in typical binocular vision.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025Trial
- Convergence Insufficiency Neuro-Mechanism Adult Population Study: Phoria Adaptation Results.Investigative ophthalmology & visual science · 2021Trial
- An Exploratory Study of the Relationship Between Phoria, Oculomotor Skills and Visual Symptoms in Children Aged 5 to 8 Years.Journal of eye movement research · 2026Article
- Underlying neurological mechanisms associated with symptomatic convergence insufficiency.Scientific reports · 2021Article
- Test-retest of a phoria adaptation stimulus-induced functional MRI experiment.Journal of vision · 2020Article
- The Convergence Insufficiency Neuro-mechanism in Adult Population Study (CINAPS) Randomized Clinical Trial: Design, Methods, and Clinical Data.Ophthalmic epidemiology · 2020Article
- Effects of aligning prisms on the objective and subjective fixation disparity in far distance.Journal of eye movement research · 2019Article
- Target Eccentricity and Form Influences Disparity Vergence Eye Movements Responses: A Temporal and Dynamic Analysis.Journal of eye movement research · 2019Article
- Dynamics of the Disparity Vergence Fusion Sustain Component.Journal of eye movement research · 2019Article
- Article
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
This study sought to determine whether symmetrical compared to asymmetrical horizontal prisms (base-out or base-in) evoked different rates of phoria adaptation. Sixteen young adults with normal binocular vision participated in a symmetrical phoria adaptation experiment using a 3Δ base-out or 3Δ base-in binocular prism flipper and an asymmetrical phoria adaptation experiment using a 6Δ base-out or 6Δ base-in monocular wedge prism. The experiments were randomized and counterbalanced to reduce the influence of the prism stimulation order. Asymmetrical base-out prism adaptation was significantly faster than symmetrical prism adaptation for subjects with normal binocular vision. Asymmetrical phoria adaptation with base-in prism was not significantly different from symmetrical phoria adaptation implying that there are directional asymmetries (convergent versus divergent eye movements) in the slow fusional component of vergence. Data suggest that a potential interaction between the version system and the slow fusional vergence system may exist. Results have clinical relevance because patients with convergence or divergence insufficiency/excess may potentially show more pronounced differences between symmetrical and asymmetrical phoria adaptation compared to binocularly normal controls. These differences might also be relevant to clinical measurements such as vergence fusional range, which can be measured symmetrically (with Risley prisms in a phoroptor) or asymmetrically (with prism bar).
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.