Business idea: opaque contact lenses

I'm at a conference and the current speaker is boring. We just had lunch. I would very much like to sleep but I'm at the front row and that would be very rude to the speaker.

In an episode of "Broad City" the main character shows she's able to sleep with her eyes opened.

I can't do that (is it even possible?) but I would buy opaque contact lenses that would let me fake awareness, in a heartbeat.

I'm guessing many business people, many politicians, not to mention high school students, would be very interested in that product.

Can anyone make it?