Impact of Stepping Over Obstacles of Different Contrast and Height on Gait and Eye Movements in Older Adults With and Without Vision Impairment
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 200
- 试验地点
- 2
- 主要终点
- Vertical foot clearance, lead limb
研究概览
简要总结
Falls are common among people with vision impairment and can lead to devastating health consequences. Understanding the functions of vision and how the visual characteristics of obstacles in the walking path impact the gait of people with vision impairment is necessary to create strategies to prevent falls in this population. The purpose of this study is to determine how adults with vision impairment change their gait behavior when stepping over obstacles that vary in height and contrast to the ground. We will then determine the mechanisms of gaze behavior that correlate to the gait behavior.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age 18 or over
- •Able to walk independently
- •Either have normal vision, or impaired vision.
- •Impaired vision is defined as binocular visual acuity of 20/25 or worse with or without a central scotoma; and/or binocular visual field that is restricted to an average of 100 degrees in diameter or less
- •Control subjects will have visual acuity of 20/40 or better.
排除标准
- •Not cleared by a medical provider for moderate physical activity
- •Self-report or have a history of: vestibular disorder or deafness
- •Medical history of any condition that affects the ability to walk for up to 2 hours with breaks, such as feeling dizzy or faint, chest pain, palpitations, pain or numbness in the legs, shortness of breath,
- •Cognitive limitations either by self-report or a score on the Mini Mental State Exam below 24 (out of 30)
- •Walking or gait abnormalities, such as those caused from an injury, surgery, severe arthritis, or neurological condition such as Parkinson's disease
- •Unable to walk without any walking aids such as a walker, cane, guide dog, or oxygen tank.
- •Does not speak English
结局指标
主要结局
Vertical foot clearance, lead limb
时间窗: During a single intervention visit (Study Visit 2), up to 2-3 hours in duration.
Distance from lowest point of foot (heel or toe) to top of obstacle
Foot placement variability
时间窗: During a single intervention visit (Study Visit 2), up to 2-3 hours in duration.
Standard deviation of position of toe to obstacle over 2-4 steps before the obstacle
Obstacle crossing speed
时间窗: During a single intervention visit (Study Visit 2), up to 2-3 hours in duration.
Speed from lead toe off immediately before the obstacle to trail heel down immediately after the obstacle.
Gaze sequencing
时间窗: During a single intervention visit (Study Visit 2), up to 2-3 hours in duration.
Sequence of fixations from start of trial to end of trial, normalized to the total duration and divided into 100 equal segments
次要结局
未报告次要终点
研究者
Shirin E. Hassan
Associate Professor
Indiana University