How Bright 2

There is a mute person 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?

Scroll down for answer.............but hey don't cheat !!!

He just has to open his mouth and ask, so simple.