Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Scotopic Sensitivity(also: Irlen Syndrome, Visual Stress, Meares-Irlen Syndrome)
- A visual-perceptual condition in which certain wavelengths of light cause discomfort, distortion, or difficulty when reading. People with scotopic sensitivity may experience text appearing to shimmer, move, or blur on the page, particularly with high-contrast black text on white…
- Sensory Overload(also: Sensory Overwhelm, Overstimulation)
- A state in which the brain receives more sensory input than it can effectively process, leading to stress, anxiety, difficulty concentrating, and in severe cases, meltdowns or shutdowns. Sensory overload can be triggered by excessive visual complexity, noise, crowds, bright or…
- Simultaneous Color Contrast(also: Simultaneous Contrast)
- A perceptual phenomenon where the appearance of a colour is influenced by the colours surrounding it, causing the same colour to look different when placed against different backgrounds. For example, a grey square appears lighter against a dark background and darker against a…
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