A system of writing and printing for visually impaired or sightless people, in which varied arrangements of raised dots representing letters and numerals are identified by touch.

• 盲人点字;供视力障碍或失明者用的书写和印刷方法体系,其中用不同排列的凸点符号代表字母或数字,通过触摸方式来辨认。