Obstacle Negotiation in Older People With and Without Vision Impairment

Официальное название

Impact of Stepping Over Obstacles of Different Contrast and Height on Gait and Eye Movements in Older Adults With and Without Vision Impairment

Обзор

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.

Вмешательства

• Другое Obstacle characteristics
  In the walking trials, when an obstacle is present, the obstacle height and obstacle contrast level will be varied across the trial repetitions. Each participant will be exposed to obstacles of two heights: the first will be 1 centimeter in height, and the second will be approximately 20% of the subject's leg length (ranging in physical height between 15 - 22 centimeters to cover a range of leg lengths in the population). Obstacles (of both heights) will also be painted such that their measure

Первичные конечные точки

• Vertical foot clearance, lead limb [Срок оценки: During a single intervention visit (Study Visit 2), up to 2-3 hours in duration.]
• Foot placement variability [Срок оценки: During a single intervention visit (Study Visit 2), up to 2-3 hours in duration.]
• Obstacle crossing speed [Срок оценки: During a single intervention visit (Study Visit 2), up to 2-3 hours in duration.]
• Gaze sequencing [Срок оценки: During a single intervention visit (Study Visit 2), up to 2-3 hours in duration.]

Критерии участия

Критерии включения

• 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.

Критерии исключения

• 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

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Да

Дизайн исследования

Распределение

Нерандомизированное

Модель

Параллельные группы

Маскирование

Открытое

Основная цель

Фундаментальное исследование

Центры проведения

США · 1 центр

• Indiana University — Bloomington

Идентификаторы

NCT: NCT05888441 · 16447

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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