SLIDE 1
Ba Balance
and Visual Field Loss
REGINA DE LUNA 4TH YEAR MEDICAL STUDENT JOHNS HOPKINS SCHOOL OF MEDICINE
Why balance?
Critical element of health Essential for independent lifestyle Balance problems à ↑ fall risk
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 - - 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 fall risk Vision and balance
SLIDE 2
SLIDE 3
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
SLIDE 4
What is balance?
Maintain a center mass within the base
- f support
We used lightweight motion sensors
Measured movements in real time
Base of support Center of mass
SLIDE 5
Methods
Two testing conditions Visual field loss: visual field test Balance: sway and jerk data from wearable sensors
Test Condition 2 Standing Surface Foam pad Carpet (firm surface) Eyes
- pen
Eyes closed Eyes
- pen
Eyes closed Test Condition 1
SLIDE 6
Total sway
Area bounded by vectors of acceleration
SLIDE 7
Jerk
Smoothness of sway
SLIDE 8
Visual field loss significantly associated with increased total sway when you stood with eyes open on a foam surface.
Eyes open foam Eyes open firm Eyes closed foam Eyes closed firm
Total visual field and total sway
More sway Less sway
SLIDE 9
Visual field loss significantly associated with increased jerk when you stood with eyes open on a foam surface.
Eyes open foam Eyes open firm Eyes closed foam Eyes closed firm
Total Visual field and Jerk
More jerk Less jerk
SLIDE 10
Visual field loss significantly associated with increased jerk and sway when you stood with your feet together
Feet Together Feet Tandem Feet Semi-Tandem Feet Together Feet Tandem Feet Semi-Tandem
Visual field and Total Sway/Jerk
Total Sway Jerk
More Less
SLIDE 11
Visual field loss in the superior visual field was significantly associated with increased sway
Superior Visual Field Inferior Visual Field
Visual Dependence
Greater field loss Lesser field loss
SLIDE 12
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.
SLIDE 13
- Dr. Pradeep Ramulu
Aleks Jess Andrea Rani Will
YOU (FIGS Participants)