Legibility of buttons / Blind man

Blind person may have difficulty in doing buttons up when wearing clothes since they can not directly see buttons like ordinary people.
This kind of buttons is designed for the blind person with the braille on the button clip. Under this situation, blind person can easily find the corresponding positions according to the braille on buttons. When it is convenient for the blind person to fasten buttons, it can be said that their quality of life is improved to some extent.
When using this kind of button, blind person can directly fasten the button clip to the corresponding button with the assistance of the braille. Without the normal fastening