Hi, Due_Accountant.
I understand that you didn't mean it this way, but your post comes across as quite offensive.
1) This is a space for people who have a visual impairment or who identify as blind. There is no "them"; there is "us". You are speaking directly to the people represented here, not _about_ the people represented here.
2) All of these questions can be answered with a google search. There are many videos on YouTube about everything you've asked from respected and knowledgeable parties.
3) If you still want to ask your questions, please 1) reformat it to be more respectful of the community and 2) post it in our
$1.
Cheers.