Question

name the most effective tactual resource used for visually challenged person who developed this system
list its important features​

Answer 1

Answer:

The most popular resource for visually challenged persons is Braille. Louis Braille developed this system and published it in braille is a system that uses combinations of raised dots to spell letters and numbers. braille system helps to the visually challenged persons through braille script consisting of raised dots that allow blind person to read and write.

These dot positions form a rectangle composed of 2 columns with 3 dots in each column. A single dot or any combination of dots may be raised at any of the 6 positions. Counting spaces, in which no dots appear, there are 64 English braille combinations in total

Explanation:

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