IQ test

Want to test  your IQ?  Try this question:

There is a mute (doof-stom persoon) who wants to buy a toothbrush. By
imitating the action of brushing one's teeth, he successfully expresses
himself to the Shopkeeper and the purchase is done.

Now if there is a blind man who wishes to buy a pair of sunglasses, how
should he express  himself?

Think about  it first before scrolling down for the answer.