One question IQ test

There is a mute 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 highlighting the answer...
<span class='standouttext'>Spoiler : </span><span class='spoiler'>
He just has to open his mouth and ask, so simple.
If you got this wrong please - do not pass this, just go dig a hole,
lie in it and pull the dirt back over yourself.
</span>

Mea Culpa's Demesne Note; artwork for Avatar courtesy of NWN and CEP Old Elven Saying: "Never say Never if you're gonna live forever!!!" "I didn't do it, it wasn't my fault"