Ba Balance and Visual Field Loss REGINA DE LUNA 4 TH YEAR MEDICAL - PowerPoint PPT Presentation

Ba Balance and Visual Field Loss REGINA DE LUNA 4 TH YEAR MEDICAL STUDENT JOHNS HOPKINS SCHOOL OF MEDICINE

Why balance? Critical element of health Essential for independent lifestyle Balance problems à ↑ fall risk

Vision and balance Vision: important sensory input in balance Previous studies: Location of vision loss impacts balance Because of your contribution… We understand relationship of balance and visual field loss in the largest studied sample of glaucoma patients

What is balance? Maintain a center mass within the base of support Center of mass We used lightweight motion sensors Measured movements in real time Base of support

Test Condition 1 Methods Standing Surface Two testing conditions Carpet (firm surface) Foam pad Eyes Eyes Eyes Eyes Visual field loss: visual field closed closed open open test Test Condition 2 Balance: sway and jerk data from wearable sensors

Total sway Area bounded by vectors of acceleration

Jerk Smoothness of sway

Total visual field and total sway Eyes open foam Eyes open firm Eyes closed foam Eyes closed firm Less sway 0 More sway Visual field loss significantly associated with increased total sway when you stood with eyes open on a foam surface.

Total Visual field and Jerk Eyes open foam Eyes open firm Eyes closed foam Eyes closed firm Less jerk 0 More jerk Visual field loss significantly associated with increased jerk when you stood with eyes open on a foam surface.

Visual field and Total Sway/Jerk Feet Together Total Sway Feet Tandem Feet Semi-Tandem Feet Together Jerk Feet Tandem Feet Semi-Tandem Less 0 More Visual field loss significantly associated with increased jerk and sway when you stood with your feet together

Visual Dependence Superior Visual Field Inferior Visual Field Greater field 0 Lesser field loss loss Visual field loss in the superior visual field was significantly associated with increased sway

Take home points 1. Increased sway/jerk (measures of worse balance) A) foam surface with eyes open B) feet together 2. Increased sway: superior visual field > inferior visual field loss 3. Be aware that if your glaucoma is advanced, your balance may be poor.

THANK YOU! Dr. Pradeep Ramulu Aleks Jess Andrea Rani Will YOU (FIGS Participants)