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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Maclure Test

This is a reading test specifically designed for children. Each age has been given a grade, numbered 1 to 7. If a child's reading ability is not equal to the average age, it can be recorded by the grade number. Within each grade print sizes N5, N6, N8, N10, N12, N14, N18, N24, N36, & N48 have been used. This test is designed to differentiate between children's ability to see and their ability to read.

Macular Degeneration

Macular degeneration is the main cause of severe vision loss in people over age 60. It occurs when the small central part of the retina, the macula, deteriorates.

Minolta Paper

A specialist paper onto which images can be printed and made into tactile diagrams.


Orientation and Mobility teaches safe, efficient, and effective travel skills to people of all ages and is specific to blindness and low vision.


Moon is considered a suitable reading medium for people who have been print readers and have lost their sight later in life. Many older people are discouraged by the finger sensitivity and effort required to learn braille; Moon enables those people to regain their enjoyment in reading.
Moon allows children with a severe visual impairment and additional learning difficulties to access literacy.

MS Word

This is a graphical word processing program used for typing. It is made by the computer company Microsoft. Its purpose is to allow users to type and save documents.


A concept relating to or involving several physiological sense.