An interventional study of Frequency of contrast marking on stair steps in Vision, Low and Mobility Limitation, sponsored by The University of Alabama in Huntsville. Recruiting at 1 site in United States. Open to participants aged 65 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-05-01.
Sponsored by The University of Alabama in Huntsville · Not applicable, Interventional, and Prevention
The goal of this study is to learn if contrast frequency on step tread-edges influences foot clearance measures, a marker of fall risk, in older adults with and without visual impairments.
The main questions that aim to be answered are how foot clearance measures change across different frequencies of stair contrast, and how experiences and perceptions of different stair contrast frequencies are evaluated.
Researchers will compare individuals with and without visual impairments to see if contrast frequency on step tread-edges changes.
Participants will attend one visit during which their vision will be measured, and they will be asked to ascend and descend laboratory stairs at different contrast frequencies.
An optional second visit will entail a focus group meeting to better understand how contrast affects mobility in their home and everyday life.
98 studies on the registry are indexed under Vision, Low; 23 are open to participants now.
This study's planned enrollment of 65 is close to the median of 60 across 78 interventional studies indexed under Vision, Low.
Browse Vision, Low studies →This is the only study on the registry with The University of Alabama in Huntsville as lead sponsor.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
All participants will participate in the experimental arm, that involves a factorial model approach inwhich all participants will experience all eight conditions.
Other: Frequency of contrast marking on stair steps
Frequency of contrast marking on stair steps will be evaluated to determine how foot clearance, perceptions in older adults with and without impaired contrast sensivity
Toe clearance
Toe, foot vertical clearance on stair steps
Time frame: visit 1, through study completion, an average of 1 year
Heel clearance
heel, foot horizontal clearance on stair steps
Time frame: visit 1, through study completion, an average of 1 year
Frequency of <5mm toe clearances
how often \<5mm toe clearances occur
Time frame: visit 1, through study completion, an average of 1 year
Frequency of <5mm heel clearances
how often \<5mm toe clearances occur
Time frame: visit 1, through study completion, an average of 1 year
Likert-Scale responses of contrast marking frequency conditions
5-point range from strongly dislike to strongly like
Time frame: visit 1, through study completion, an average of 1 year
Perception responses of contrast marking frequency conditions
Collected via auditory responses
Time frame: visit 1, through study completion, an average of 1 year
Plan to share: Yes — We will archive our deidentified metadata to the Inter-University Consortium for Political and Social Research (ICPSR).
Supporting information: Study protocol, Analytic code
Time frame: The IDP will be made available within 6 months after publication, and will be made publicly available for 3 years.
Access criteria: Access will be monitored through ICPSR.
Data sharing details ↗ · www.openicpsr.org
No publications or documents are linked to this record.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.