Glossary

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Saccade(also: Saccadic Eye Movement)

A rapid, ballistic eye movement that shifts the point of fixation from one location to another. Saccades are essential for visual search, reading, and scanning the environment. In low-vision rehabilitation, training saccadic eye movements helps individuals develop efficient…

Scotoma(also: Blind Spot, Visual Field Defect)

An area of partial or complete loss of vision within the visual field, surrounded by areas of relatively normal or less affected vision. Scotomas can result from conditions such as macular degeneration (central scotoma), glaucoma (peripheral scotomas), or retinal damage. People…

Scotoma(also: Blind Spot, Visual Field Defect)

An area of partial or complete loss of vision within an otherwise normal visual field. Scotomas can be central (affecting the area of sharpest vision) or peripheral, and may be caused by conditions such as macular degeneration, glaucoma, optic neuritis, or retinal damage. In the…

Screen Magnification(also: Screen Magnifier, Zoom)

Software or built-in operating system features that enlarge a portion of the screen display to make content more readable for people with low vision. Screen magnification tools are available on all major platforms, including the Zoom function on macOS and iOS, Magnifier on…

Screen Magnification(also: Screen Magnifier, Display Magnification)

Software or operating system features that enlarge a portion of the screen content to make it readable for people with low vision. Common modalities include full-screen magnification (which expands the entire display around a movable center point) and lens magnification (which…

Screen Magnifier(also: Screen Magnification Software, Magnification Software)

An assistive technology application that enlarges a portion of the screen display to make content more readable for people with low vision. Screen magnifiers work by rendering a zoomed-in view of the area around the cursor or focus point, often providing additional features such…

Skilled Vision(also: Vernacular Vision, Professional Vision)

Skilled vision is a concept from visual culture and anthropology that describes the process of learning to see and interpret visual information in specialized ways within a particular community of practice. Originally applied to professional fields (e.g., radiologists learning…

Space compaction(also: Horizontal compaction, White space reduction)

An accessibility technique used in screen magnification software and browser extensions that reduces excessive white space and adjusts column widths to minimize horizontal scrolling. For low-vision users who rely on high magnification levels (often 3x-16x), horizontal scrolling…

Stargardt Disease(also: Stargardt Macular Dystrophy, Juvenile Macular Degeneration)

An inherited eye disease that causes progressive damage to the macula, leading to central vision loss typically beginning in childhood or adolescence. Stargardt disease is the most common form of inherited macular degeneration. It may also affect color vision. Unlike age-related…

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