[beretguy]

Or contact lenses that just make billboards disappear. Contact lenses ad blocker. I bet even people with perfect vision would want these.

[JoshTriplett]

I read a sci-fi story in which someone managed to "disappear" in front of the protagonist's eyes; he found out later that the person wrapped themselves in a passing advertisement banner and was thus hidden by the personal adblocker everyone has.

[amelius]

Imagine a truck covered in ads ...

[jajko]

Add 3-5x zoom, thermal/night vision and you have 7 billion buyers