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Objective evaluation of fusional vergence after a vision therapy protocol in typical binocular vision.

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Title: Objective evaluation of fusional vergence after a vision therapy protocol in typical binocular vision.
Authors: Rovira‐Gay, Cristina (AUTHOR), Argiles, Marc (AUTHOR), Mestre, Clara (AUTHOR), Masdemont‐Isern, Marta (AUTHOR), Pujol, Jaume (AUTHOR)
Source: Ophthalmic & Physiological Optics. Jul2025, Vol. 45 Issue 5, p1173-1185. 13p.
Subjects: Binocular vision, Binocular vision disorders, Health outcome assessment, Visual training, Experimental groups, Control groups, Adults
Abstract: Introduction: Vision therapy is an effective treatment option for binocular vision and accommodative anomalies. However, its effect on typical binocular vision is less documented. The aim of this study was to evaluate objectively the change in near fusional vergence amplitudes in adults with typical binocular vision after performing a vision therapy protocol. Methods: Thirty‐four adults were randomly classified into an experimental group (EG), who underwent a vision therapy protocol for 12 weeks, and a control group (CG), who received a placebo treatment for 12 weeks (Phase 1). In Phase 2, the CG performed the same therapy protocol as the EG. Fusional vergence amplitudes were measured objectively in a haploscopic set‐up using smooth and step fusional vergence tests. The break points of positive and negative fusional vergence (PFV and NFV, respectively) were determined using a custom algorithm. Results: After Phase 1, there were no significant differences between the groups for fusional vergences. After Phase 2, PFV and NFV increased significantly as measured with the smooth and step tests (p = 0.002 and p < 0.001 for NFV and p = 0.03 and p = 0.02 for PFV, respectively). These improvements were maintained after 1 month without any further intervention (all p > 0.05). Conclusion: Based on these results, clinicians should consider that the vergence system cannot be trained beyond 2 and 5 Δ for NFV and PFV, respectively, when aiming to enhance vergence skills with vision therapy in patients without binocular dysfunctions. [ABSTRACT FROM AUTHOR]
Copyright of Ophthalmic & Physiological Optics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Objective evaluation of fusional vergence after a vision therapy protocol in typical binocular vision.
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  Data: Introduction: Vision therapy is an effective treatment option for binocular vision and accommodative anomalies. However, its effect on typical binocular vision is less documented. The aim of this study was to evaluate objectively the change in near fusional vergence amplitudes in adults with typical binocular vision after performing a vision therapy protocol. Methods: Thirty‐four adults were randomly classified into an experimental group (EG), who underwent a vision therapy protocol for 12 weeks, and a control group (CG), who received a placebo treatment for 12 weeks (Phase 1). In Phase 2, the CG performed the same therapy protocol as the EG. Fusional vergence amplitudes were measured objectively in a haploscopic set‐up using smooth and step fusional vergence tests. The break points of positive and negative fusional vergence (PFV and NFV, respectively) were determined using a custom algorithm. Results: After Phase 1, there were no significant differences between the groups for fusional vergences. After Phase 2, PFV and NFV increased significantly as measured with the smooth and step tests (p = 0.002 and p &lt; 0.001 for NFV and p = 0.03 and p = 0.02 for PFV, respectively). These improvements were maintained after 1 month without any further intervention (all p &gt; 0.05). Conclusion: Based on these results, clinicians should consider that the vergence system cannot be trained beyond 2 and 5 Δ for NFV and PFV, respectively, when aiming to enhance vergence skills with vision therapy in patients without binocular dysfunctions. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Ophthalmic &amp; Physiological Optics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1111/opo.13528
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 1173
    Subjects:
      – SubjectFull: Binocular vision
        Type: general
      – SubjectFull: Binocular vision disorders
        Type: general
      – SubjectFull: Health outcome assessment
        Type: general
      – SubjectFull: Visual training
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      – SubjectFull: Experimental groups
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      – SubjectFull: Control groups
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      – SubjectFull: Adults
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    Titles:
      – TitleFull: Objective evaluation of fusional vergence after a vision therapy protocol in typical binocular vision.
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            NameFull: Rovira‐Gay, Cristina
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            NameFull: Argiles, Marc
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            – D: 01
              M: 07
              Text: Jul2025
              Type: published
              Y: 2025
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              Value: 45
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