Glossary

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Repetitive Strain Injury(also: RSI, Repetitive motion injury, Overuse injury)

A category of injuries affecting muscles, tendons, and nerves caused by repetitive movements, sustained awkward postures, or overuse of a body part. In the context of accessibility, repetitive strain injuries are a significant concern for manual wheelchair users, who experience…

Repetitive Stress Injury(also: RSI, Repetitive Strain Injury, Repetitive Motion Injury)

A group of conditions caused by repetitive movements, forceful exertions, or sustained awkward postures over extended periods, resulting in damage to muscles, tendons, nerves, or other soft tissues. In computing contexts, RSI commonly affects the hands, wrists, arms, shoulders,…

Restricted Field of View(also: Tunnel Vision, Peripheral Vision Loss, Visual Field Loss)

A condition in which the area of the visual environment that a person can see at any given moment is significantly reduced, often described as looking through a tunnel or a narrow tube. Restricted field of view can result from conditions such as glaucoma, retinitis pigmentosa,…

Restricted Interest(also: Circumscribed Interest, Perseverative Interest, Fixated Interest)

An intense, narrow focus on specific topics, objects, or activities that is characteristic of autism spectrum disorder. Restricted interests can range from common subjects like trains, maps, or specific fictional characters to highly unusual topics like electricity pylons or…

Retinopathy of Prematurity(also: ROP)

An eye condition that can occur in premature infants when abnormal blood vessels grow in the retina. In severe cases, these vessels can cause scarring, retinal detachment, and significant vision loss or blindness. ROP is one of the leading causes of childhood blindness and low…

Rigidity(also: Muscle Rigidity, Stiffness)

Increased muscle tone causing stiffness and resistance to passive movement, commonly experienced in Parkinson's Disease and other neurological conditions. Unlike spasticity (which varies with movement speed), rigidity is constant throughout the range of motion. Rigidity affects…

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