Journal article
Changes in the Disparity Vergence Main Sequence after Treatment of Symptomatic Convergence Insufficiency in Children
Journal of eye movement research, v 12(4), 6
04 Dec 2019
PMID: 32190204
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This study investigates the underlying physiological mechanisms that may lead to improved outcomes for symptomatic convergence insufficiency (CI) patients after 12 weeks of office-based vergence/accommodation therapy (OBVAT) by evaluating the change in the main sequence of vergence and saccadic eye movements. In this prospective trial, 12 participants with symptomatic CI were recruited and treated with 12 weeks of OBVAT. Outcome measures included the objective assessment of the following: peak velocity, time to peak velocity, latency, response amplitude, and clinical changes in the near point of convergence (NPC), positive fusional vergence (PFV) and symptoms via the Convergence Insufficiency Symptom Survey (CISS). Ten of the twelve participants (83%) were categorized as "successful" and two were "improved" based on pre-determined published criteria (CISS, NPC, PFV). There were statistically significant changes in peak velocity, time to peak velocity, and response amplitude for both 4 degrees and 6 degrees symmetrical convergence and divergence eye movements. There was a significant change in the main sequence ratio for convergence post-OBVAT compared to baseline measurements (P=0.007) but not for divergence or saccadic responses. Phasic/step vergence movements adjust the underlying neural control of convergence and are critical within a vision therapy program for CI patients.
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Details
- Title
- Changes in the Disparity Vergence Main Sequence after Treatment of Symptomatic Convergence Insufficiency in Children
- Creators
- Mitchell Scheiman - Salus UniversityChang Yaramothu - New Jersey Institute of TechnologyTara L. Alvarez - New Jersey Institute of Technology
- Publication Details
- Journal of eye movement research, v 12(4), 6
- Publisher
- Int Group Eye Movement Research
- Number of pages
- 11
- Grant note
- NSF MRI CBET 1428425 / National Science Foundation; National Science Foundation (NSF) Department of Health and Human Services, Bethesda, Maryland, USA NEI R01EY023261 / National Eye Institute of the National Institutes of Health; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Eye Institute (NEI)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Pennsylvania College of Optometry (PCO)
- Web of Science ID
- WOS:000523260000006
- Scopus ID
- 2-s2.0-85079538510
- Other Identifier
- 991021900611604721
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- Web of Science research areas
- Ophthalmology