How do the blind go shopping?

Whenever we study consumers and shoppers, we always get into Bachelors, HCMs, Teens, Seniors, etc.
I have never thought about how people with disabilities shop.

Seeing this braille mall floor map in Hong Kong got me thinking: How do the blind go shopping?
And yes, kudos to the mall planners who planned with them in mind.

I searched the web and found this insightful interview in youtube: 

How do people who are blind go grocery shopping?