• • • Visual impairment - moderate. • • • Visual impairment - severe. • • • Blindness. • • Deaf-blindness. • • • Limited dexterity. • • • Limited use of hands/arms. • • • Weak grip. • • • Hand tremor.

Enlarged keys enable persons with poor dexterity to press the correct key. A concave shape to the keys will also help fingers to stay in place.

Large clear typefaces should be used to improve legibility for persons with low vision. See Visual contrast key legends for further information.