Glossary
Searchable terminology from accessibility, web standards, and related fields.
101 results found in conditions.
- Cortical visual impairment (CVI, Cerebral visual impairment)
- A neurological form of visual impairment caused by damage or atypical structures in the visual pathways and visual processing centres of the brain, rather than in the eyes themselves. CVI is now the m…
- Deafblind (Deaf-Blind, Deafblindness, Dual Sensory Loss)
- A condition involving combined hearing and vision loss that significantly affects communication, access to information, and mobility. Deafblindness is not simply the sum of deafness and blindness — it…
- Deafblindness (Deaf-Blindness, Dual Sensory Impairment, Combined Vision and Hearing Loss)
- Deafblindness is a combined vision and hearing impairment that creates unique challenges beyond those associated with either sensory loss alone. It is not simply the sum of deafness and blindness — th…
- Decreased Sound Tolerance (DST, Sound Intolerance)
- Decreased sound tolerance (DST) is an umbrella term for conditions in which everyday sounds are perceived as uncomfortably loud, threatening, or emotionally distressing. It encompasses hyperacusis (ab…
- Dementia (Major neurocognitive disorder)
- An umbrella term for a group of symptoms related to progressive decline in memory, thinking, behaviour, and the ability to perform everyday activities, caused by diseases or injuries affecting the bra…
- Developmental Learning Disorder (DLD, Specific Learning Disorder, Learning Disability)
- A group of neurodevelopmental conditions that affect the acquisition and use of specific academic skills such as reading, writing, or mathematics. Developmental Learning Disorders include dyslexia (af…
- Digital accessibility for ageing (Age-related accessibility, Accessible ageing, Senior accessibility)
- The practice of designing digital technologies that remain usable as people experience age-related changes in vision (presbyopia, contrast sensitivity loss, cataracts), hearing (presbycusis), motor co…
- Disordered Speech (Pathological Speech, Atypical Speech)
- Speech that differs from typical patterns due to motor, neurological, structural, or developmental conditions. Disordered speech encompasses conditions like dysarthria, apraxia, stuttering, and speech…
- Drop Foot (Foot Drop, Peroneal Nerve Palsy)
- A condition characterized by difficulty lifting the front part of the foot, causing the toes to drag along the ground during walking. Drop foot is not a disease itself but a symptom of an underlying n…
- Dysarthria (Motor speech disorder, Neuromotor speech impairment)
- A group of speech disorders caused by weakness, paralysis, or lack of coordination in the muscles used for speaking, resulting from damage to the brain or nervous system. Speech may sound slurred, slo…
- Dyscalculia (Math Learning Disability, Number Blindness, Mathematics Disorder)
- A specific learning disorder that affects the ability to acquire, understand, and manipulate numerical and mathematical concepts. People with dyscalculia may have difficulty with number sense, memoriz…
- Dysgraphia (Disorder of written expression, Specific learning disorder in written expression)
- A neurological learning disability that affects written expression, including handwriting legibility, spelling accuracy, and the ability to organize thoughts in writing. Dysgraphia can make text entry…
- Dyspraxia (Developmental Coordination Disorder, DCD)
- A neurodevelopmental condition affecting motor planning, coordination, and the sequencing of movements. People with dyspraxia have difficulty translating intended actions into coordinated physical mov…
- Early-Onset Dementia (Young-Onset Dementia, Working-Age Dementia)
- Dementia diagnosed before the age of 65, affecting individuals who are often still in the workforce and digitally active. Early-onset dementia presents unique accessibility challenges because affected…
- Essential Tremor (ET, Benign Essential Tremor)
- Essential tremor is one of the most common movement disorders, characterized by involuntary, rhythmic shaking that typically affects the hands and arms but can also involve the head, voice, and other …
- Fibromyalgia (FM, Fibromyalgia syndrome)
- Fibromyalgia is a chronic condition characterized by widespread musculoskeletal pain, fatigue, sleep disturbances, and cognitive difficulties often called "fibro fog." It affects approximately 2-4% of…
- Fine Motor Function (Fine Motor Control, Fine Motor Skills, LFMF)
- The ability to make precise, coordinated movements using the small muscles of the hands and fingers. Fine motor function is essential for touch screen interaction, including tapping specific targets, …
- Flare (Symptom Flare, Flare-Up)
- A temporary but often significant worsening of symptoms associated with a chronic illness, which can last from hours to weeks. Flares can be triggered by environmental factors (heat, pollen, weather c…
- Frontotemporal Dementia (FTD, Frontotemporal Lobar Degeneration, Pick's Disease)
- A group of disorders caused by progressive degeneration of the frontal and temporal lobes of the brain, primarily affecting personality, behavior, and language. Unlike Alzheimer's disease, frontotempo…
- Gait Disturbance (Gait Abnormality, Gait Impairment, Gait Deviation)
- Any deviation from a person's normal walking pattern, including decreased walking velocity, reduced step and stride length, increased step time, asymmetrical gait, and instability. Gait disturbances c…