Question

Braille system used for visually challenged person is a:
A. Visual aid
B. Auditory aid
C. Tactual aid
D. Electronic aid

Answer 1

Hint: Braille system is a language or a code that can be used by visually challenged people. This is actually a system of raised dots. The pattern of raised dots to every alphabet is unique. Blind people or people who have less vision can sense these dots by their fingers and hence can identify the alphabets, words and sentences.

Complete answer:
Braille symbols are formed within units of space. These spaces are known as braille cells. A full braille cell consists of six raised dots. The dot positions are identified by numbers from one through six. Thus, sixty-four combinations are possible using one or more of these six dots. Not only alphabets but this system can be used to represent a number and punctuation mark.

These dotted patterns can be touched and sensed by visually challenged people. Thus, the Braille system helps visually challenged people understand alphabets. Since this system involves a use of touch, it is a Tactual aid.

Hence, option (C) is the correct answer.

Additional information: The dotted pattern used in the system of Braille is also produced by braillewriter. Braillewriter is actually a machine which is used to produce these dotted patterns. There are only six keys in this machine. These keys correspond to the six dots of Braille system. It also contains a space bar, a line spacer, and a backspace.

Note: Many publications produce different kinds of books regarding Braille systems. But, there is a standard system known as contracted Braille. This standard system is used by most of the publications. In this system the dotted pattern words are used with combination in other words. On the other hand, when every letter of every word is expressed in braille, it is referred to as uncontracted braille. Uncontracted braille is used by children. This helps them learn the language.