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Related Experiment Video

Updated: May 31, 2026

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects

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Gaze strategies for avoiding obstacles: Differences between young and elderly subjects.

Sandra Keller Chandra¹, Christopher J Bockisch, Volker Dietz

¹Research Lab, Spinal Cord Injury Center, Balgrist University Hospital, Forchstrasse 340, CH-8008 Zurich, Switzerland. skeller@paralab.balgrist.ch

|June 24, 2011

Summary

Elderly individuals exhibit distinct gaze strategies when stepping over obstacles, relying more heavily on visual cues. This research highlights age-related differences in visual input dependency for safe obstacle negotiation.

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Area of Science:

Neuroscience
Gerontology
Biomechanics

Background:

Safe obstacle negotiation is crucial for mobility, especially in aging populations.
Visual input plays a significant role in gait adjustments for obstacle avoidance.
Age-related changes in sensory processing may impact motor control strategies.

Purpose of the Study:

To investigate age-related differences in gaze behavior during obstacle stepping.
To compare gaze strategies between elderly, middle-aged, and young adults.
To determine the influence of visual fixation targets and stepping precision on gaze patterns.

Main Methods:

Gaze behavior was measured using video-oculography in elderly, middle-aged, and young subjects.
Participants repeatedly stepped over obstacles on a treadmill under various visual fixation and stepping precision conditions.
Obstacle approach (left/right) and visual fixation targets (near/far) were manipulated.

Main Results:

In high-precision stepping conditions, a higher percentage of subjects gazed at obstacles for longer durations.
Elderly subjects showed a significantly greater tendency to gaze at obstacles compared to younger groups, especially when fixating on a near target.
Elderly participants initiated gaze shifts towards obstacles earlier and maintained them for longer periods.

Conclusions:

Elderly individuals demonstrate a distinct gaze behavior strategy, indicating a heightened reliance on visual information for safe obstacle negotiation.
These findings suggest that age-related declines in other sensory systems may necessitate greater visual compensation.
Understanding these gaze strategies can inform interventions to improve mobility and reduce fall risk in older adults.