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Balance Control in Individuals With Visual Impairment: A Systematic Review and Meta-Analysis
Hamed Zarei1, Ali Asghar Norasteh2, Lauren J Lieberman3
1Faculty of Physical Education & Sport Sciences, University of Guilan, Rasht,Iran.
Background:
Individuals with visual impairment have balance deficits; therefore, this systematic review aimed to provide comprehensive insights into the balance control of individuals with visual impairments when compared with individuals with full vision.
Methods:
Primary sources were obtained from eight databases including PubMed, LILACS, Science Direct, SCOPUS, CINAHL, PEDro, CENTRAL, and Web of Science. The search period covered years from inception to January 10, 2022.
Results:
A total of 20 studies with 29 trials with 1,280 participants were included in the systematic review. The results showed that individuals with sight had better static and dynamic balance than individuals with visual impairment (p = .001). However, individuals with visual impairment had significantly better static balance with visual perturbation and stronger static balance with visual and proprioception perturbation (p = .001). Furthermore, individuals with sight had better balance control than individuals with visual impairment who participated in sports (p = .001). Finally, individuals with visual impairment who participated in sports had better balance control than sedentary people with visual impairment (p = .001).
Conclusion:
Individuals with visual impairment have defects in both dynamic and static balance when compared to individuals with sight. In addition, balance improved with increasing age in individuals with visual impairment while balance control was dependent on the proprioception and vestibular systems. Also, individuals with sight had better balance than individuals with visual impairment who participated in sports and individuals with visual impairment who participated in sports compared with sedentary people with visual impairment.
