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Testing Tactile Aids With Blind Subjects

Who can join

Ages 16 and older · All sexes · Healthy volunteers welcome

Inclusion Criteria:

* Visual Impairment: Participants should be blind or visually impaired for greater than 10 years, either congenitally or acquired.
* Tactile Aid Usage: Participants must use tactile aids regularly.
* Mathematical Knowledge: Participants should have a basic understanding of mathematical plots, equivalent to at least high school geometry.

Exclusion Criteria:

\- Limb Conditions: Participants with amputations or outer extremity conditions affecting hand use will be excluded.

About the study

The objective of this project is to create richer tactile aids by using materials chemistry to create tactile sensations in tactile aids, as an alternative to traditional physical bumps, lines, or textures. These materials are commonly used in household products, but have not yet been used to enrich tactile aids. Successful outcomes are primarily the accuracy with which low vision or blind subjects identify objects made from tactile coatings versus traditional tactile aids. Other outcomes include time to completion of the task, or the number of distinctive categories that participants can identify.

What is being tested

• Single bump acuity (behavioral)
• Optimal spacing between bumps (behavioral)
• Improving signal from a single bump with designer materials (behavioral)

Sponsor: University of Delaware · Participants: 100 · Started: Sep 1, 2021

Contact the study team

Official record on ClinicalTrials.gov — NCT06237829

Locations in the U.S.

Conditions

• Low Vision
• Blindness

From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.