Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 44 of 333
- Blind-Perspective Training (Non-Visual Training, Blindfold Training)
- An educational and vocational training approach where all learners, regardless of their level of functional vision, are taught skills using non-visual techniques such as touch, hearing, and propriocep…
- BlindSquare
- A GPS-based iOS accessibility app designed for people who are blind or have low vision, providing spoken information about the surrounding environment — nearby points of interest, intersections, stree…
- Blindness (Total Blindness, Visual Blindness)
- A condition of having no functional vision or light perception, requiring entirely non-visual means of accessing information and navigating the environment. Blind users typically rely on screen reader…
- Blindness (Blind, Total Blindness, Complete Vision Loss)
- A condition characterised by the complete or near-complete absence of functional vision, ranging from no light perception to minimal light awareness that cannot be used for practical tasks. Blind indi…
- Blindness and Low Vision (BLV, visual impairment, vision impairment)
- Blindness and low vision (BLV) collectively describes the spectrum of significant visual impairment ranging from complete absence of sight to partial sight loss that cannot be fully corrected with sta…
- Blissymbols (Blissymbolics, Bliss Language)
- A symbolic language created by Charles K. Bliss, consisting of several hundred basic symbols that can be combined to create new meanings. Unlike pictographic symbol sets where each image represents a …
- Block-Based Programming (Visual Block Programming, Block Coding, Blocks-Based Programming)
- A programming paradigm where users create code by selecting and connecting visual blocks that snap together like puzzle pieces, rather than typing text-based syntax. Each block represents a programmin…
- Blockchain (Distributed Ledger, Distributed Ledger Technology, DLT)
- A blockchain is a distributed, append-only digital ledger in which records (blocks) are cryptographically linked and replicated across a decentralized network of nodes. No single party controls the da…
- Blocks-Based Programming (Block Programming, Visual Block Programming, BBPE)
- A programming paradigm designed to introduce coding concepts to beginners — particularly children — by representing code as visual, interlocking blocks that are dragged and dropped to construct progra…
- Blocks4All
- An accessible touchscreen-based block-based programming environment designed for students with visual impairments. Blocks4All enables drag-and-drop-like programming interactions on touchscreen devices…
- Blood Oxygen Saturation (O2sat, SpO2, Oxygen Saturation)
- The percentage of hemoglobin in the blood that is bound to oxygen, typically measured non-invasively using a pulse oximeter. Normal blood oxygen saturation is generally 95-100%, and levels below 88-90…
- Bloom's Taxonomy
- A hierarchical framework originally proposed by Benjamin Bloom in 1956 and later revised, classifying educational learning objectives into levels of cognitive complexity: remembering, understanding, a…
- Blue Cone Monochromatism (BCM, S-cone Monochromacy)
- A rare inherited vision condition in which only the blue (short-wavelength) cones function, resulting in severely reduced color vision, reduced visual acuity, photophobia, and nystagmus. Affected indi…
- Bluetooth (BLE, Bluetooth Low Energy)
- A short-range wireless communication standard used to exchange data between devices over distances of up to approximately 30 metres. In accessibility, Bluetooth is widely used in assistive technology:…
- Bluetooth Beacons (BLE Beacons, iBeacons, Bluetooth Low Energy Beacons)
- Small wireless transmitters that use Bluetooth Low Energy (BLE) to broadcast signals to nearby smartphones and other devices. In accessibility contexts, Bluetooth beacons are deployed in indoor enviro…
- Bluetooth Foot Pedal (Page Turn Pedal, Wireless Foot Pedal)
- A wireless input device operated by foot that connects to tablets, computers, or specialized music-reading hardware via Bluetooth to enable hands-free page turning of digital music scores. Bluetooth f…
- Bluetooth Low Energy (BLE, Bluetooth LE, Bluetooth Smart)
- A wireless communication technology designed for short-range data transmission with minimal power consumption. In accessibility contexts, BLE is widely used for indoor positioning and wayfinding syste…
- Bluetooth Low Energy Beacon (BLE Beacon, iBeacon, Bluetooth Beacon)
- A small, low-power wireless transmitter that broadcasts Bluetooth Low Energy (BLE) signals at regular intervals. In accessibility contexts, BLE beacons are widely used for indoor navigation systems fo…
- Bluetooth beacon (BLE beacon, iBeacon)
- A small wireless transmitter that uses Bluetooth Low Energy (BLE) to broadcast signals to nearby devices, enabling indoor positioning and proximity detection. In accessibility applications, beacon net…
- Blurred Vision Simulation (Vision Simulation, Low Vision Simulation)
- A technique used in accessibility evaluation where evaluators simulate the visual experience of people with reduced visual acuity by artificially blurring their view of a website or application. Metho…