Glossary

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CCTV(also: Closed Circuit Television, Video Magnifier, Desktop Video Magnifier)

A camera-based magnification system used by people with low vision to enlarge text and images on a monitor. Traditional CCTVs consist of a camera mounted over a reading platform that captures material placed beneath it and displays it magnified on an attached screen. Modern…

CCTV Magnifier(also: Closed-Circuit Television Magnifier, Video Magnifier, Desktop Video Magnifier)

An assistive device that uses a camera to capture an image of text or objects and displays it magnified on a screen, typically a television or computer monitor. CCTV magnifiers are one of the most widely used low vision aids, offering high levels of magnification, adjustable…

Cataracts(also: Cataract)

A clouding of the eye's natural lens that causes blurry or hazy vision and increased sensitivity to glare. Cataracts are the leading cause of vision impairment worldwide and become increasingly common with age. People with cataracts may experience difficulty reading, reduced…

Central Vision Loss(also: Central Scotoma, Macular Vision Loss)

Loss of vision in the central part of the visual field, typically caused by conditions affecting the macula such as macular degeneration or Stargardt disease. Central vision is responsible for detailed tasks like reading, recognizing faces, and seeing fine detail. Musicians with…

Central Vision Loss(also: Central Field Loss, Central Scotoma)

Loss of vision in the central part of the visual field, typically caused by damage to the macula — the area of the retina responsible for sharp, detailed vision. People with central vision loss experience difficulty seeing fine details directly in front of them, often describing…

Color Blindness(also: Color Vision Deficiency, CVD, Colour Blindness)

A condition in which the ability to distinguish certain colors is reduced or absent, most commonly affecting the perception of red and green. Color blindness affects approximately 8% of males and 0.5% of females of Northern European descent. In music education, color-coded…

Color Filter(also: Color Filters, Display Color Filter)

An operating-system or browser-level feature that alters how colors are rendered on screen, including grayscale, inverted colors, and filters for protanopia, deuteranopia, and tritanopia color vision deficiencies. Used by low-vision users and users with color vision deficiency…

Contrast Sensitivity

The ability to distinguish between objects and their background based on differences in luminance or color. Contrast sensitivity is distinct from visual acuity and can be reduced even when acuity is relatively preserved. People with poor contrast sensitivity may struggle to read…

Cursor Locator(also: Pointer Locator, Cursor Finder, Find My Cursor)

A software utility that helps users find the position of their mouse pointer on screen when it has been lost from view. Cursor locators typically activate through a keyboard shortcut or by detecting pointer behavior such as rapid shaking, and then draw attention to the pointer's…

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