Stroboscopic Goggles Impair Postural Control in Those With and Without Chronic Ankle Instability: A Critically Appraised Topic

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Abstract
Clinical Scenario: Ankle sprains are highly common and can lead to chronic ankle instability (CAI). Individuals with CAI have a variety of sensorimotor impairments including poor postural control and altered sensory organization strategies. Visual occlusion modalities, if worn during neuromuscular control exercises, may facilitate greater postural control gains and a more appropriate sensory organization strategy. However, a cumulative review of the ability of visual occlusion modalities (e.g., stroboscopic goggles) to impair postural control and thus demonstrate the potential to facilitate greater postural gains has not yet been completed. Clinical Question: Does stroboscopic vision impair postural control in those with and without CAI, and if so, is the impairment comparable between the groups? Summary of Key Findings: Regardless of how postural control was assessed, stroboscopic vision impaired postural control relative to an eyes open (i.e., no goggles) condition. All studies demonstrated that those with and without CAI were impacted equally. Stroboscopic vision resulted in postural control impairments comparable to an eyes closed in some but not all studies. Clinical Bottom Line: Stroboscopic vision impairs postural control in both those with CAI and uninjured controls. Strength of Recommendation: There is moderate-quality evidence (Grade B) that stroboscopic vision impairs postural control in those with CAI and uninjured controls.

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