Gaze stabilization and dynamic visual acuity in people with multiple sclerosis

2017 ◽  
Vol 26 (5-6) ◽  
pp. 469-477 ◽  
Author(s):  
Mark M. Mañago ◽  
Margaret Schenkman ◽  
Jean Berliner ◽  
Jeffrey R. Hebert
Keyword(s):  
Multiple Sclerosis ◽  
Visual Acuity ◽  
Dynamic Visual Acuity ◽  
Gaze Stabilization

scholarly journals Sport-specific differences in dynamic visual acuity and gaze stabilization in division-I collegiate athletes

2020 ◽  
Vol 30 (4) ◽  
pp. 249-257
Author(s):  
C. Quintana ◽  
N.R. Heebner ◽  
A.D. Olson ◽  
J.P. Abt ◽  
M.C. Hoch
Keyword(s):  
Visual Acuity ◽  
A Priori ◽  
Collegiate Athletes ◽  
Division I ◽  
Normative Values ◽  
Dynamic Visual Acuity ◽  
Gaze Stabilization ◽  
Concussion Management ◽  
Vestibular Ocular Reflex ◽  
Concussion History

BACKGROUND: The vestibular-ocular reflex (VOR) integrates the vestibular and ocular systems to maintain gaze during head motion. This reflex is often negatively affected following sport-related concussion. Objective measures of gaze stability, a function mediated by the VOR, such as the computerized dynamic visual acuity test (DVAT) and gaze stabilization test (GST), may have utility in concussion management. However, normative data specific to sport, sex, or concussion history have not been established in collegiate athletes. OBJECTIVE: The objective of this study was to establish normative values for the DVAT and GST in collegiate athletes and explore the effect of sport, sex, and concussion history on VOR assessments. METHODS: The DVAT and GST were completed by 124 collegiate athletes (72 male, 52 female, mean±SD, age: 19.71±1.74 years, height: 173.99±13.97 cm, weight: 80.06±26.52 kg) recruited from Division-I athletic teams (football, soccer and cheerleading). The DVAT and GST were performed in the rightward and leftward directions during a single session in a standardized environment. Normative values for DVAT and GST measures were expressed as percentiles. Non-parametric statistics were used to compare differences between groups based on sex, sport, and concussion history. Alpha was set a-priori at 0.05. RESULTS: Overall, the median LogMAR unit for 124 athletes completing the DVAT was 0 (IQR = 0.17) for both leftward and rightward. The median velocities achieved on the GST were 145 °/sec and 150 °/sec (IQR = 45 and 40) for the leftward and rightward directions respectively. Significant differences were observed between sports (p = 0.001–0.17) for the GST with cheerleading demonstrating higher velocities than the other sports. However, no significant differences were identified based on sex (p≥0.09) or history of concussion (p≥0.15). CONCLUSIONS: Normative estimates for the DVAT and GST may assist in the clinical interpretation of outcomes when used in post-concussion evaluation for collegiate athletes. Although sex and previous concussion history had no effect on the DVAT or GST, performance on these measures may be influenced by type of sport. Sport-related differences in the GST may reflect VOR adaptations based on individual sport-specific demands.

Comparison of the Gaze Stabilization Test and the Dynamic Visual Acuity Test in Unilateral Vestibular Loss Patients and Controls

2015 ◽  
Vol 36 (4) ◽  
pp. 746-753 ◽  
Author(s):  
Courtney C. J. Voelker ◽  
Amelia Lucisano ◽  
Dorina Kallogjeri ◽  
Belinda C. Sinks ◽  
Joel A. Goebel
Keyword(s):  
Visual Acuity ◽  
Dynamic Visual Acuity ◽  
Vestibular Loss ◽  
Gaze Stabilization ◽  
The Gaze ◽  
Visual Acuity Test ◽  
Acuity Test

Vestibular Rehabilitation Outcomes in Chronic Vertiginous Patients Through Computerized Dynamic Visual Acuity and Gaze Stabilization Test

2007 ◽  
Vol 28 (6) ◽  
pp. 809-813 ◽  
Author(s):  
Carlo Badaracco ◽  
Francesca Sylos Labini ◽  
Annalisa Meli ◽  
Ezio De Angelis ◽  
Davide Tufarelli
Keyword(s):  
Visual Acuity ◽  
Vestibular Rehabilitation ◽  
Dynamic Visual Acuity ◽  
Gaze Stabilization ◽  
Rehabilitation Outcomes

Effect of vestibular rehabilitation on passive dynamic visual acuity

2008 ◽  
Vol 18 (2-3) ◽  
pp. 147-157
Author(s):  
Matthew Scherer ◽  
Americo A. Migliaccio ◽  
Michael C. Schubert
Keyword(s):  
Visual Acuity ◽  
Exercise Program ◽  
Home Exercise ◽  
Dynamic Visual Acuity ◽  
Gaze Stabilization ◽  
Ocular Reflex ◽  
Gaze Stability ◽  
Before And After ◽  
Vestibulo Ocular Reflex ◽  
Head Impulses

While active dynamic visual acuity (DVA) has been shown to improve with gaze stabilization exercises, we sought to determine whether DVA during {passive} head impulses (pDVA) would also improve following a rehabilitation course of vestibular physical therapy (VPT) in patients with unilateral and bilateral vestibular hypofunction. VPT consisted of gaze and gait stabilization exercises done as a home exercise program. Scleral search coil was used to characterize the angular vestibulo-ocular reflex (aVOR) during pDVA before and after VPT. Mean duration of VPT was 66 ± 24 days, over a total of 5 ± 1.4 outpatient visits. Two of three subjects showed improvements in pDVA with a mean reduction of 43% (LogMAR 0.58 to 0.398 and 0.92 to 0.40). Our data suggest improvements in pDVA may be due in part to improvements in aVOR velocity and acceleration gains or reduced latency of the aVOR. Each subject demonstrated a reduction in the ratio of compensatory saccades to head impulses after VPT. Preliminary data suggest that active gaze stability exercises may contribute to improvements in pDVA in some individuals.

Dynamic visual acuity in an applied setting.

1961 ◽  
Author(s):  
James E. Goodson ◽  
James W. Miller
Keyword(s):  
Visual Acuity ◽  
Dynamic Visual Acuity
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