Static and dynamic postural control in low-vision and normal-vision adults

• Main Authors: Mônica S.V. Tomomitsu, Angelica Castilho Alonso, Eurica Morimoto, Tatiana G. Bobbio, Julia M.D. Greve
• Format: Article
• Language: English
• Published: Faculdade de Medicina / USP 2013-04-01
• Series: Clinics
• Subjects: Low Vision; Postural Balance; Motor Control
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1807-59322013000400517
• ISSN: 1807-5932; 1980-5322

OBJECTIVE: This study aimed to evaluate the influence of reduced visual information on postural control by comparing low-vision and normal-vision adults in static and dynamic conditions. METHODS: Twenty-five low-vision subjects and twenty-five normal sighted adults were evaluated for static and dynamic balance using four protocols: 1) the Modified Clinical Test of Sensory Interaction on Balance on firm and foam surfaces with eyes opened and closed; 2) Unilateral Stance with eyes opened and closed; 3) Tandem Walk; and 4) Step Up/Over. RESULTS: The results showed that the low-vision group presented greater body sway compared with the normal vision during balance on a foam surface (p≤0.001), the Unilateral Stance test for both limbs (p≤0.001), and the Tandem Walk test. The low-vision group showed greater step width (p≤0.001) and slower gait speed (p≤0.004). In the Step Up/Over task, low-vision participants were more cautious in stepping up (right p≤0.005 and left p≤0.009) and in executing the movement (p≤0.001). CONCLUSION: These findings suggest that visual feedback is crucial for determining balance, especially for dynamic tasks and on foam surfaces. Low-vision individuals had worse postural stability than normal-vision adults in terms of dynamic tests and balance on foam surfaces.