Tactile Aids for Visually Impaired Graphical Design Education
Samantha McDonald, Joshua Dutterer, Ali Abdolrahmani, Shaun K. Kane, Amy Hurst · 2014 · Proceedings of the 16th International ACM SIGACCESS Conference on Computers & Accessibility (ASSETS 2014) · doi:10.1145/2661334.2661392
Summary
This demonstration paper describes the creation of over 10 tactile aids using laser cutting and 3D printing to make graphic design theory accessible to a visually impaired student enrolled in an introduction to human-centered computing class at UMBC. The course unit covered inherently visual topics — color theory, typefaces, font families, character spacing, grid layouts, and web page design — traditionally taught through visual images that are inaccessible to students with limited or no vision. The research team converted class slide images into 3D-printable and laser-cuttable designs, fabricating tactile representations from acrylic, wood, and thermoplastic elastomer filament. The aids were designed to be as close to the original class visuals as possible, though simplifications were made to avoid tactile clutter. For example, a serif vs. sans serif font comparison tool removed extraneous typographic labels (counter, stroke, ascender) that would have confused the tactile experience. Complex grid anatomy diagrams for web layouts were separated into multiple individual tactile pieces, each focusing on a single concept like rows or columns. All designs were created and tested within a three-week span, demonstrating the feasibility of rapid, on-demand tactile aid production for educational settings.
Key findings
The participant reported increased real-time understanding of class material and greater emotional satisfaction, being able to follow along with sighted peers without feeling behind. Several practical findings emerged for tactile design: material choice matters significantly — initial hardwood designs caused finger exhaustion and dulled tactile sensation over extended use, while acrylic and 3D plastic filament were much more effective. For raised alphanumeric characters, words with many vertical strokes (like "COLUMN" with seven vertical lines across L, U, M, N) were nearly impossible to differentiate tactually; solutions included adding inter-letter spacing and using larger filled letters. Capitalized text was easier to read due to naturally increased size and spacing. Larger, more oversized letter forms were consistently easier for the participant to identify. The participant could not read Braille but could still recognize printed alphanumeric letter shapes from prior visual experience, which aided in understanding typeface concepts.
Relevance
This work demonstrates that rapid prototyping tools (laser cutters and 3D printers) can make traditionally visual educational content accessible to visually impaired students quickly, inexpensively, and on demand. For accessibility practitioners and educators, the key takeaway is that visual design concepts — often assumed to be inherently inaccessible — can be effectively conveyed through tactile representations when thoughtfully simplified. The practical design guidelines around material selection, letter sizing, spacing, and information separation are directly applicable to anyone creating tactile learning materials. The paper also highlights an important workforce issue: as web development and graphic design industries grow, making design education accessible is essential for opening these career paths to people with visual impairments. Limitations include the single-participant study and the need for access to fabrication equipment.
Tags: visual impairment · tactile graphics · 3D printing · rapid prototyping · education · graphic design · web design · inclusive education