Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Deconvolution
- A computational process that reverses the blurring effects of convolution in an optical or imaging system. In the context of visual accessibility, deconvolution is used to pre-process images displayed on a computer screen so that when viewed through an eye with known…
- Depth Perception(also: Stereopsis)
- The visual ability to perceive the relative distance of objects in three-dimensional space. Depth perception relies on binocular vision and other visual cues. Reduced depth perception can affect a persons ability to navigate physical environments safely, judge distances, and…
- Diabetic Retinopathy(also: DR)
- A complication of diabetes that damages the blood vessels of the retina, potentially causing vision loss ranging from mild blurriness to complete blindness. Diabetic retinopathy can produce scattered and varied patterns of vision loss across the visual field, making it distinct…
- Dynamic Type(also: Dynamic Text Size, Text Scaling, Font Scaling)
- An iOS accessibility feature that allows users to adjust the system-wide text size to meet their reading needs, from very small to very large. Apps that support Dynamic Type automatically reflow and resize their text content when the user changes their preferred text size in…
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