• • • Visual impairment - moderate
• • • Visual impairment - severe
Many telephones use small text displays that show dark characters on a mid-tone background. This is very difficult to read for most people with low vision.
It is very important to display text and numbers in a way that provides maximum contrast between the characters and the background.
Pale colours and colours which are close in tone should be avoided.
White or yellow type on black or a dark colour is more legible provided that the typeface weight and size are suitable. Small type and very bold type tend to blur for some people, reducing legibility.
