Visual Impairment Glossary

Vision impairment and blindness, its causes, and assistive resources come with a huge range of terminology. Browse our glossary to learn the meanings of these terms. 

Fingers type on a BrailleNote touch
Browse the glossary using this index

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Albinism is a genetic condition also called achromia, achromasia, or achromatosis. It occurs due to a deficit in the production in melanin and shows by the partial or complete absence of pigment in the skin, hair and eyes.

Aleatoric Music

This is refers to a type of music where some element of the composition is left to chance, or a part is left to the interpretation of the performer.

Assistive Technology

Assistive technology is a piece of equipment or system, that is used to increase, maintain, or improve functional capabilities of a child with a disability.
Assistive technology is a term that includes assistive, adaptive, and rehabilitative devices for people with disabilities.

Audible Light Probe

Light probes can be used by blind people, or those with reduced light perception, to tell how light or dark it is, if lights have been left on or the status of indicator lights/LEDs on appliances.